Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfbe137e3b6a38a…

MALICIOUS

PDF

34.1 KB Created: 2020-08-21 12:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c35f1817234cb5ad0d8cb1538b120b2 SHA-1: b40e127d2a1c7a85aed30842665a4ae1dcd7fd89 SHA-256: 0cfbe137e3b6a38a6a00383631b5b303daedcf909ec9464ec0dd4fb837f2077f
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 redirector link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=tamil+movie+whatsapp+status+video', is designed to lead users to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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.ru/pify?keyword=tamil+movie+whatsapp+status+video
    • http://files.sweetsavannahs.com/uploads/1/3/2/7/132712323/lalujopet_lujaj_ranunuzafijuje_lezig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/jugis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/xukure.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/17208712991.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/munode.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/xenesu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2847/8102/files/basher_sabertooth_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/35471858038.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9429/files/envision_math_6th_grade_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/jopowovivasadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/37297216740.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/53107707237.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_off00004a1a.bin
13c0443c8e1c64520f97a9da031f6c9923b193bbbbdbe5fff581e6ea6404eed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1A 5204 bytes
font_01_sfnt_off00005bc3.bin
8dafae5c9d80fe922be4e7a857b7e703c9208188df8abd418253b1f80e418393
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC3 9468 bytes