Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c70a710027ed7d8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 03:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 331261640aa2fc49ef89aae13f5eaf26 SHA-1: 4c0f92c8de0a33148fe10b33c76662988b6dfc50 SHA-256: 8c70a710027ed7d8860b858e359867caa2864f30a94c31f1d7d4da3b5e5eb2b1
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a Google Form. This indicates a phishing or social engineering attack. The presence of numerous other links hosted on Shopify and other domains suggests a link farm designed to obscure the malicious redirector. No scripts were extracted, but the primary malicious functionality is the redirection to the ttraff.cc domain.

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.cc/pify?keyword=about+me+google+form
    • http://files.michellekhuu.com/uploads/1/3/0/7/130775734/8909918.pdf
    • http://wavif.creswickfnc.com/uploads/1/3/0/9/130969723/jeladajibev-naxotikejep-midukamesi.pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.elwoodmadison.com/uploads/1/3/1/3/131384635/bebete.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/gudomewuledoviripabove.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/tolebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/1952655466.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/vagulape.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/tajebipofuzofun.pdf
    • https://cdn.shopify.com/s/files/1/0440/2852/6742/files/loan_agreement_paper.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/lean_bulking_workout.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/loposegupugobonererariz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7605/files/8830627002.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/burujeratesajijewatutosif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/veponazemepodetomajub.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/telenigasiluxalowo.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_off000066b1.bin
333d2c33bf172fd1f75590b1784ae00a22fc7a3e9afaa684765f96b4f4ad9f5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 4828 bytes
font_01_sfnt_off00007712.bin
e0380b5022590d151e851424473d30dbe901270d41c507e6472bfe5b4014d9c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 10520 bytes