Malicious PDF — malware analysis report

Static analysis result for SHA-256 15302203a7c6afd3…

MALICIOUS

PDF

46.5 KB Created: 2020-08-18 22:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5788635c8c7e79e484daf71e996626bd SHA-1: fd3470fcaff5d68fc7a6505ecec12e4253923386 SHA-256: 15302203a7c6afd38e43a7dbcf3ab598b1a54ad2619eaf716731da2c3c66c9d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. One prominent link, 'https://ttraff.com/pify?keyword=android+wear+watches+2017', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating a lure to potentially malicious content.

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=android+wear+watches+2017
    • http://keromozol.virtualracesusa.com/uploads/1/3/1/4/131453540/7480813.pdf
    • http://gajamiv.midwalesluxuryhuts.co.uk/uploads/1/3/0/8/130814851/3617447.pdf
    • http://files.donandmargieabroard.com/uploads/1/3/1/0/131071076/f2b818fc74ed0.pdf
    • http://files.drnoelcasiano.com/uploads/1/3/1/6/131607712/3d7f2ccfaf.pdf
    • http://files.sandywalkerwrites.com/uploads/1/3/2/7/132741764/8605360.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/great_courses.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/56985188173.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/agrarian_revolution_in_britain.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/annales_chimie_terminale_s.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/domor.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/zureturejigoluvefem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/citizen_bl5250_02l.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/adalat_movie_bhojpuri_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/ascendance_trilogy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/siuda_gramatyka_angielska.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_off00007788.bin
d6f18bfd72db56c18ed1a190c7ecfd4ca26fe170c572b76ec7248447c29dfb2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 5480 bytes
font_01_sfnt_off00008a40.bin
e575554f477a942020e72aba32c8db56957c9bfc85e8884b81d715817c9a91aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 10308 bytes