Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2e04aecfeea568…

MALICIOUS

PDF

44.8 KB Created: 2020-08-16 19:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459904515791aa8c652bca49f730b517 SHA-1: 0d4c049ca9680a9121f58661e00c16d232ac32cc SHA-256: 5f2e04aecfeea5680f9338223959df76e39a2a395186d21e358617c727ff9372
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, disguised with a lure related to FaceTime audio calls. The document also hosts a large number of links to other PDFs, likely for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest 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.ru/pify?keyword=facetime+audio+says+answered+on+another+device
    • http://files.alexravensister.com/uploads/1/3/0/9/130969965/7570064.pdf
    • http://files.softshores.com/uploads/1/3/1/3/131378952/3859457.pdf
    • http://files.simpsonlawn.com/uploads/1/3/1/4/131454620/e8bb1ca5df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/20132276292.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/jabef.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/97694033987.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/tidexiwav.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/maths_formulas_for_class_11_and_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/22389167796.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/tusotapobejinode.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/jagemevedobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/33968081722.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/xidikokunukimokes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/golavorov.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/vegetable_oil_refining_process.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_off00006fd8.bin
a8c981974bd9d4d6ae9ad0a93b5fe8b6306c98780a33cc54c0f7f7f269efa77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 5356 bytes
font_01_sfnt_off000081f3.bin
72f4e41c20d9ba3daee692c43240a1e7ba3c28a8cf6366b27b044b6ce8d43d04
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F3 10524 bytes