Malicious PDF — malware analysis report

Static analysis result for SHA-256 a100fca31bf30da7…

MALICIOUS

PDF

42.9 KB Created: 2020-07-30 10:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e7b85dfd8a48e3045555f48fe06ca62 SHA-1: 2f7a67b710e11876987fb2b3a2728ef9214e625a SHA-256: a100fca31bf30da701ba5d078a0b3d2df0bb097691197430aa78ab9c471bde87
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to a book, likely a lure. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, potentially for further exploitation or phishing.

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.ru/pify?keyword=the+ultimate+band+saw+box+book+pdf In PDF document text
    • http://files.duralumbuildingcenter.com/uploads/1/3/1/3/131378838/ee43b7cf.pdfIn PDF document text
    • http://files.biggsbassethounds.com/uploads/1/3/1/8/131857071/84fb7a2093dbc.pdfIn PDF document text
    • http://files.babsbeadwarehouse.com/uploads/1/3/1/6/131606396/9908d0de.pdfIn PDF document text
    • http://files.alohaawamori.com/uploads/1/3/1/6/131606803/pamipaliloza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/58613312873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4446/8898/files/17133320497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/pemaxotevofigajefokikida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/78747952607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/kimuwonudisepetubetugiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/11257606005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/87167453485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/2717849214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/zorutemasozixakoxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/lulixomewusunexisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/95801750874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/2129061018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/doraxibibodaxexererus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/jelodedovetexapij.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 5380 bytes
SHA-256: eca8cfcfac517aa8544d57e4535ced6439e2a49ddb477c8d921b806cf1978da2
font_01_sfnt_off00006d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D90 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off00007d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D40 9588 bytes
SHA-256: 88862d2ed55d2ff2eeeaa1179b2ac308af1975d8452a814c3263183c5c0874fd