Malicious PDF — malware analysis report

Static analysis result for SHA-256 877730ffa137a0a2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 09:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea4895bfc71e1ee7c8d875d95ed66f02 SHA-1: 64ffd77017f788b2c02bea02fbc9534508194b23 SHA-256: 877730ffa137a0a259cc7349a15543b4ef466d99a1a6681b288f9b1d41c60111
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, masquerading as educational material, that point to a redirector URL. This redirector is flagged as malicious and likely serves to funnel victims to a phishing or malware distribution site. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to attract unsuspecting users.

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.cc/pify?keyword=bahan+ajar+akuntansi+biaya+pdf In PDF document text
    • http://laneves.bearcreekfrenchies.com/uploads/1/3/1/3/131383791/7344864.pdfIn PDF document text
    • http://files.crepusculumchoir.com/uploads/1/3/0/8/130814192/masanejerawuz.pdfIn PDF document text
    • http://files.kevinpascalethomas.com/uploads/1/3/0/7/130738789/b17dc7ffc2adcae.pdfIn PDF document text
    • http://files.lmbuer.com/uploads/1/3/0/7/130775400/8544276.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/1/0439/5096/4904/files/gepami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/viscous_fluid_flow_white_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/jogizodexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/wiped.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1868/0482/files/12537964372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/solucion_isotonica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6910/2485/files/carol_of_the_bells_satb_a_cappella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/15297256620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/zekatomozivuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.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 5

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_off00005b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5528 bytes
SHA-256: c66950370a5d0227c68c778ee763747a91d159abe17505790e28e72150b654b2
font_01_sfnt_off00006e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E38 13584 bytes
SHA-256: ada83942599104a33fb959ff8b76fe41e636633d8d820d12cccb40cbc7602a1d

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