Malicious PDF — malware analysis report

Static analysis result for SHA-256 723cd77e6f0bbd20…

MALICIOUS

PDF

48.7 KB Created: 2020-07-31 11:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e046191e9c67eb85779fa7f923ae7e0 SHA-1: 1dc2c7af9fbdeaab08ad927b495a620a58a334b7 SHA-256: 723cd77e6f0bbd20abfa687b0eda88fabb6b9033ef4708838cab353d8c1850c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links that redirect to a link farm, which in turn hosts many other PDFs. The primary redirector URL is identified as malicious. This suggests a phishing or SEO poisoning campaign aimed at driving traffic to potentially malicious content. No scripts were extracted, but the embedded links are the primary vector for this attack.

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=homogeneous+differential+equations+examples+pdf In PDF document text
    • http://files.pvreiki.com/uploads/1/3/1/6/131637640/fupaweleli-lifarizefa-xotagafagumuzup.pdfIn PDF document text
    • http://files.intowishinarts.com/uploads/1/3/0/7/130775286/rosaf.pdfIn PDF document text
    • http://files.father-son-holy-spirit.com/uploads/1/3/0/9/130969372/2970369.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/1/0433/4475/6901/files/77160595872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/83648107777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/64245793794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/49797431123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/83583076073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/42802115973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/guponimobekoguraxiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/90775610343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/vopigatufoderuwomel.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: intowishinarts.com 5 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5400 bytes
SHA-256: ef704dc5cd6581c407eb8ac179718a863dd91bc2b1b4712351239490d8b6f86c
font_01_sfnt_off000075a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 13616 bytes
SHA-256: f55f161e3ea8ffad121b36c4748dabeb7c01517bbc5212f668e456a56401151e
font_02_sfnt_off0000a0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DF 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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