Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce015b85de1a9d0…

MALICIOUS

PDF

37.0 KB Created: 2020-08-20 02:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8673aeb67f84c2982ba188336bd14f2e SHA-1: e5e172eda7ebc88075fcaed76d8b0e8850119c9e SHA-256: 7ce015b85de1a9d02e2c66eff28fb7b35dcbc18daac3e47994e22472551026fb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary links, 'https://ttraff.com/pify?keyword=free++afro+trap+instrumental+beats', is flagged as a malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the SEO link farm heuristic strongly indicate malicious intent.

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=free++afro+trap+instrumental+beats
    • http://files.welcome2stmarks.com/uploads/1/3/1/3/131381204/sawufaranun.pdf
    • http://lalujiw.hdblues.org/uploads/1/3/1/4/131437622/f74de03e1c17dc.pdf
    • http://dedijo.deniseterriah.com/uploads/1/3/1/4/131453215/kafuje-ronakapubij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/mortal_kombat_snes_controls.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/19655418899.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/62675622818.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/68407345765.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/94369718847.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/transformaes_isobricas_exercicios_resolvidos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/nuguti.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/xisavogoremuvemof.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/wakadepuduwu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/mathematical_optimization_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/autumn_leaves_alto_sax_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/79964740783.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/fetal_skull_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/anemia_ferropenica_microcitica_hipocromica.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_off00004f20.bin
f2ac9f88d25c37fefbf309120bd70c87f884a797cb09a0c137db45afdf3b85d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F20 5144 bytes
font_01_sfnt_off00006085.bin
f31d14a00061d617f02f6e61d2ac8620836cafff6bcc9b8d73be6b708f87102f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 11100 bytes

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