Malicious PDF — malware analysis report

Static analysis result for SHA-256 0601c889ed8ce2cb…

MALICIOUS

PDF

46.2 KB Created: 2020-08-07 02:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4728ddde2f8a012b46ec8fa806a84b8 SHA-1: b423b8ee10d0df9e6ae96278ab879179b462210e SHA-256: 0601c889ed8ce2cb8d63a2d399cc202a7c85c500ed2a30c77491c195b0295bdf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a document about chemical additives. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm designed to distribute malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

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=aditivos+quimicos+nos+alimentos+industrializados+pdf
    • http://files.tenderheartsdaycare.org/uploads/1/3/0/7/130775304/monezilabago.pdf
    • http://files.heb11design.com/uploads/1/3/1/6/131637037/gasadevuwelawedodati.pdf
    • http://files.bidgeesrun.com/uploads/1/3/0/7/130775940/rekizogedeza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/88329579404.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/jenumoboku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/zeretunigiropazeride.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/vanopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/53337042476.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/nimedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/bruchgleichung_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/58275518650.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/jidimasugilad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/98730296035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/berichtsheft_vorlage_ihk_bayern.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000653f.bin
8398056db4d5bc35e1bd24085faa46a3121cca668f1d4c4c67eaf225bae17e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 5408 bytes
font_01_sfnt_off00007793.bin
a318bcaf1c31d0ac4f6a7564d5afe504c9d6562003ec4875e948ffedd67c6d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 11000 bytes
font_02_sfnt_off00009b77.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B77 4324 bytes

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