Malicious PDF — malware analysis report

Static analysis result for SHA-256 721ed4d478611c8d…

MALICIOUS

PDF

57.5 KB Created: 2020-08-06 15:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 018e96d5d13d576139ccf0ef0ed4b313 SHA-1: 96cc9e0810b7704e9123b0ecbbeaa61f84510538 SHA-256: 721ed4d478611c8dc5ad823cf516c4349460f40b6b8672a16c770911602307f2
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=enduring+vision+apush+textbook+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The presence of multiple external PDF links and a high ML classifier score indicate a malicious intent, likely to redirect users to a phishing or malware download site.

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=enduring+vision+apush+textbook+pdf In PDF document text
    • http://wogulukes.susannahnix.com/uploads/1/3/1/4/131452988/nudixowonij.pdfIn PDF document text
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdfIn PDF document text
    • http://files.offthehookkiteboarding.com/uploads/1/3/0/7/130740055/nutopavolasuran.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/1/0434/5259/6374/files/13788873729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/53192696919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/fedotevezuzufobepewuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/30795512813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/mobutezuvusulozizif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/46302617018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/95971446075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gideripeloduze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/31438629609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/kegazusuvigutolow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/6241334294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC8 5560 bytes
SHA-256: 5e53d1b729283c8435d7e4b3d4085f2f73041906f9e7453dd9e8d8d0b2a365e8
font_01_sfnt_off0000adb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB6 13112 bytes
SHA-256: 9ad526de71042e02a1f909db0ce70f34a35883b3e74795c025f52263b21ace84

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