Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4861e7968075f1…

MALICIOUS

PDF

55.2 KB Created: 2020-08-04 11:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b69e5c0fc11f1255a43cdff2c74d26b8 SHA-1: c3ec7d1b85d39db417c07c625d3bbe6337405a29 SHA-256: 0f4861e7968075f13062558d48a797abc61407a7d4904bc9a1df87a7af672085
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=bernoulli+equation+maths+pdf`. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=bernoulli+equation+maths+pdf In PDF document text
    • http://files.spiritfireshaman.com/uploads/1/3/2/7/132741382/lotizakisubanas-xutov-tijonopimubepal.pdfIn PDF document text
    • http://files.martigraceashby.com/uploads/1/3/1/4/131438216/puzazu.pdfIn PDF document text
    • http://files.kristinsurak.com/uploads/1/3/1/3/131383319/femoj.pdfIn PDF document text
    • http://files.robertacarr.com/uploads/1/3/2/7/132740871/3662152.pdfIn PDF document text
    • http://sisolaso.niclasfransson.com/uploads/1/3/0/7/130739835/sarazavole-rotutot-tureguv-juditonited.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/24483912258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/zusexupajosewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/el_caminante_y_su_sombra_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5074/4478/files/6201639847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/mibivaril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/jamosoforovavuwovafatur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1707/4850/files/gozedopibedaterorosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/java_jdk_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/bivobefumukatifatepel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/nawetojufafaxuwaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/23254908862.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 6832 bytes
SHA-256: e04cfe7e9b463f3c34ad59a79dcc57ba2195eb5760a8ffbba07a6267c1bc0cde
font_01_sfnt_off0000780a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 5456 bytes
SHA-256: d1e5df6e264e899c42d6f00a31f73a9141a20300f45ff8c00435f93ffe44e036
font_02_sfnt_off00008a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A65 1956 bytes
SHA-256: 87f4dc9fc1dc24012f317389c1eb0370a9430534078bbe5b7f9ba8065666d42c
font_03_sfnt_off00009386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9386 10716 bytes
SHA-256: bb5d280d95882deb362aa244d001c2e27a6bd47593ff2097514717ff2c7e5349
font_04_sfnt_off0000b842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB842 16488 bytes
SHA-256: d26fdce492fb9e8c49f527e3a91555393c735dd4d56e489be838b86a3f7c22b7