Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a80f30e50c8aec…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 17:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0977440c8c8df7218bb0939f377160a SHA-1: 24e7f343ed9881a521959b93555b589966c7fc0f SHA-256: d1a80f30e50c8aec5feb7175c69b393fab34d373a72b0434c4c0eca7535a6906
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are hosted on Shopify but also include links to suspicious domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=marpol+annex+3+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=marpol+annex+3+pdf
    • http://karivupol.zenic8.com/uploads/1/3/1/4/131406982/kurubet_xitixekelerali_gabevitigel.pdf
    • http://files.rockymtlaceguild.org/uploads/1/3/1/8/131871424/zewubek_ziwozulim.pdf
    • http://wovaxega.streamingmadeasy.com/uploads/1/3/0/7/130775169/1925592.pdf
    • http://files.tomfosterclippers.com/uploads/1/3/1/4/131453541/novilorul-punok.pdf
    • http://files.whiterivermwd.com/uploads/1/3/1/1/131164157/ruwuvat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/zumonupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/35528581351.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/73493593627.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/william_foley_anthropological_linguistics.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/fazideladitawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/229980893.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/lomuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/xaludinatewanojuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/tifikirizuwekatejisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/mulovoputiriwabozupana.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/dikedewexu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e52.bin
69cf0fc4e6f10450fe491d8b046f0cadce7af7902e47a8e975fd38cba5692893
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5096 bytes
font_01_sfnt_off00006fbc.bin
792a078d41599d0b0ad917a5b07d8850bcffa332a38e17211c0900f1fd6a3752
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 11148 bytes