Malicious PDF — malware analysis report

Static analysis result for SHA-256 888d48bf384f8949…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 22:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e29436bd6b96f482e17b3c97c777a5e6 SHA-1: 127654d4806f397bf2978f7f634a75fa559a090e SHA-256: 888d48bf384f89497cd527edce9053583a417d4c2f945e20eb2d754fb9723481
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, which in turn points to malicious infrastructure. This pattern is consistent with a phishing lure designed to trick users into downloading potentially malicious files or visiting compromised sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=computer+science+engineering+pdf In PDF document text
    • http://files.3dbikefit.com/uploads/1/3/0/7/130740625/maxiwudimaned_xunumakorip_zenunigak.pdfIn PDF document text
    • http://files.lithoscounselingandconsulting.com/uploads/1/3/0/8/130814308/9249196.pdfIn PDF document text
    • http://files.marketstreetartspot.com/uploads/1/3/0/7/130739719/8107619.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/1/0429/5501/4298/files/paraphrase_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/topaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/dowidifusebejilepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/skf_flange_bearing_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/olin_ross_sound_system_or860_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/25167630555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/dodexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/47154595249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/53216872712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/28761194175.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_off0000671f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 5136 bytes
SHA-256: 399ab077fe1005afb321d70339a68af152fc223a0da7d818df067f7606382539
font_01_sfnt_off00007880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7880 10928 bytes
SHA-256: 89360a87e45e28dd89cca0489f942e63269ad22af5b5918c62dc9e6032bd6847

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