Malicious PDF — malware analysis report

Static analysis result for SHA-256 701e866e40430d4c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 07:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbf30531be061de0e3119a69d43ae4ee SHA-1: 8be83c704ce6dd555afc0802899da3f95d8c5ea1 SHA-256: 701e866e40430d4c06c13150ef2b4e83a42247552f3abd2549cf66c00a0d4746
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, pointing to 'https://ttraff.com/pify?keyword=s+letter+images+pictures'. The presence of a large number of external PDF links, as flagged by 'PDF_SEO_LINK_FARM', suggests an attempt to distribute malicious content or engage in SEO manipulation. No scripts were extracted, and the document body is largely unreadable binary data, but the malicious links are sufficient evidence.

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=s+letter+images+pictures
    • http://poxajipel.alexlanshe.com/uploads/1/3/1/6/131606490/a25cfa2ababd6ad.pdf
    • http://files.ironstoneconcours.org/uploads/1/3/1/4/131406650/c63a72.pdf
    • http://files.tracichee.com/uploads/1/3/1/6/131606111/vageves.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/weather_yahoo_com.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/juxuzupis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/third_conditional_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/1332251121.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/agricultural_production_economics_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/iacopone_da_todi_laude.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/amoeba_sisters_classification_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/descargar_certificado_de_secundaria.pdf
    • https://cdn.shopify.com/s/files/1/0457/6211/7788/files/63304001530.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/sigozapoke.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/megunuwatagonotivanes.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d0e.bin
c387f24fc4ed28441197571be2a5d6ed2a1b743d130a7af69341ae35e2ee2e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 5356 bytes
font_01_sfnt_off00006f2a.bin
a1ff2525f5bde82797b1788e4bae8f2019d93daea90af7d17f021848ce0bef3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 14592 bytes

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