Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbca79cfaa164f18…

MALICIOUS

PDF

48.3 KB Created: 2020-08-18 17:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 760eb216479de0bf8796b478a8b5a5ee SHA-1: 5f03c8981cc24a72636a1681ba24dafef88cba6a SHA-256: cbca79cfaa164f180f3f8ab20b68932fd9d70050e1853fbb3dd63325c6d69b5f
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'cheat sheet' and the malicious URL. This suggests a social engineering attack aiming to redirect users to malicious content.

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=the+attractive+man+free+conversation+cheat+sheet In PDF document text
    • http://rikesorim.porchlightapothecary.com/uploads/1/3/1/4/131454696/pexomumuluboruke.pdfIn PDF document text
    • http://jituxidi.firstroboticsu.com/uploads/1/3/0/7/130738993/2264608.pdfIn PDF document text
    • http://files.neenahpowerlifting.com/uploads/1/3/1/6/131636843/sibakerimam_lilopesamir.pdfIn PDF document text
    • http://files.smarie94.co.uk/uploads/1/3/1/4/131437878/1725382.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/1/0432/2738/1924/files/58380167999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/sifufuzebekuvodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/88479630693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/35691863016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4287/3245/files/justmommies_pregnancy_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/nisemosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/lotus_notes_for_windows_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2718/5316/files/74355626479.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
🗂 Part of campaign: neenahpowerlifting.com 4 samples

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_off00007f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 5100 bytes
SHA-256: cc1ae240a03e01cbb8ea66c406fbe9ff3601cdb71639b0c053ef919383aa9378
font_01_sfnt_off0000904b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904B 10588 bytes
SHA-256: fe6ad3a6b536a99befd1107d550a89821afe0466d8ef51a1e9474e775bc722f6

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