Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd63147f8f61b90f…

MALICIOUS

PDF

52.1 KB Created: 2020-08-26 19:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2901b0ef05bf47f9b160389dedb00af SHA-1: 8285155e29f9df76f31ae85737011a08b307f73b SHA-256: cd63147f8f61b90f31cf874e2fd9f304d656b4f886bd252ff0585667522c9a40
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that align with these findings. The primary malicious URL identified is https://ttraff.ru/pify?keyword=signe+de+grey+turner, which is likely used to redirect users to a malicious site. The presence of numerous links, including those hosted on cdn.shopify.com and other domains, suggests a broad distribution or SEO poisoning tactic.

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=signe+de+grey+turner
    • http://xigelo.nswier.org/uploads/1/3/2/8/132814930/sojepunuvalilob_lavevexogo.pdf
    • http://xofafidu.ufoman1.net/uploads/1/3/1/4/131438464/5031478.pdf
    • http://mojewut.clumsycourierwine.com/uploads/1/3/0/7/130776688/4f5cba3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/bohr_s_model_of_hydrogen_atom_and_its_limitations.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/upsc_mains_answer_sheet_of_toppers_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9509/files/xunavonavegodome.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/67900068783.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/25785414752.pdf
    • https://cdn.shopify.com/s/files/1/0441/1952/3480/files/format_of_experience_certificate_for_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/madexajewikatozuralapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/delexo.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_off00008fac.bin
1fe5a8ce279723f9832c505e943d746125f3fb213704d9e3dab576c298619ab3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 4780 bytes
font_01_sfnt_off00009ffb.bin
2862e0d1a97715e46294f072ddf9b2d6725c81f1a63d7af6afd5e500af100d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFB 10696 bytes