Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa699e2438e909e…

MALICIOUS

PDF

34.8 KB Created: 2020-08-11 17:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d505d2aa7bbbe4ad994860e78d548c91 SHA-1: 9c710774a5cb24127f777f465e91d63b23ac08a9 SHA-256: 7aa699e2438e909e719f2d88265e2bb3751316030f7144de0f65bfe5720e5bec
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/pify?keyword=me+before+you+pdf+full', suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the PDF.

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=me+before+you+pdf+full
    • http://files.troyamsti.com/uploads/1/3/1/4/131455337/ziniraremimazubugaga.pdf
    • http://files.battlekatpdx.com/uploads/1/3/2/6/132695531/3075235.pdf
    • http://files.billiardsaustralia.com/uploads/1/3/2/7/132740371/xenozeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/alchimistul_paulo_coelho_romana.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/xiaomi_airdots_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/tc_electronic_sentry_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/raredarulafosep.pdf
    • https://cdn.shopify.com/s/files/1/0428/2200/8988/files/matilda_poem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/63849443042.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/mechanism_of_action_of_anti_inflammatory_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/dinedis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/parinelileripapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0444/7895/5687/files/workout_plan_to_gain_muscle.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/1936751968.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_off0000495d.bin
de91a7b5cbe8019b113dc89b76fdb7d8a4dfc8312fa321060dbc0c62b934670c
pdf-font-stream PDF embedded font (sfnt) at offset 0x495D 4892 bytes
font_01_sfnt_off00005a1c.bin
a591f36c4e46af65faa308adf3c63ae6c9a0ef654c380041ac673501024b8813
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 10808 bytes