Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f9b475864223e1…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 17:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39916fe10ebcb2cabfdd46f9632e6407 SHA-1: 0e7327305d9cea99e99b0474bea215cd29526192 SHA-256: a3f9b475864223e12e60b3145134049fb763230c4ef84c243c0d4daf00129d62
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a 'Graduation program template preschool'. The document body, though heavily obfuscated, includes this lure text and the malicious URL. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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=graduation+program+template+preschool In PDF document text
    • http://files.bhscommunityboard.com/uploads/1/3/0/8/130873918/kutajapififametuxo.pdfIn PDF document text
    • http://bilifamo.holylovereiki.com/uploads/1/3/0/9/130969077/0cfbb.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/1/0428/0372/4455/files/sins_of_solar_empire_rebellion_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/46910554190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/37536107855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/90554606212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/astm_a370_latest_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/42766547503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/tadafutowiwenebepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/pogulalofosanituwadar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/26055263231.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

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_off00005973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5973 5520 bytes
SHA-256: fa856d5c871edf30b424d41030ebc41b650d28664440d2420e0dee0ba5772dbe
font_01_sfnt_off00006c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0E 13256 bytes
SHA-256: ea59a90bd2a3a5a7b8f400360cb222877af62da4b0d7fef6096f56e27b3aa005
font_02_sfnt_off000095cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CB 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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