Malicious PDF — malware analysis report

Static analysis result for SHA-256 545979ae9349313b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 23:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4f7e41b1ca1d08da90fac7479793f08 SHA-1: 2f839afb9e7662052500b2c005eb89eff4f9d00c SHA-256: 545979ae9349313baa8a399381df2e6a1d66674872f998e8d3779abccd927151
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO farm or redirection abuse. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.com redirector URL, which is likely used to funnel victims to further 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=hemostasis+cascade+pdf
    • http://files.lustrepeach.com/uploads/1/3/1/4/131452838/8443556.pdf
    • http://files.rabbileah.com/uploads/1/3/0/7/130739971/mavek-wedakazaxazizov.pdf
    • http://files.ontrackracing.com.au/uploads/1/3/1/6/131606782/rukal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/glacier_core_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/84998071.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/linosixuduvimavamugukem.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/cera_bathroom_fittings_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/45670536799.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/55431981211.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/sosyal_bilgiler_testi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/gutifidoduvewemugaxule.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/waxepabog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/towebomoxorafem.pdf
    • https://cdn.shopify.com/s/files/1/0448/4258/2176/files/algebraic_expression_exercise.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_off00007037.bin
5ce539e5720139b14c5569d83c0b1ba446664ba131c6194060613f565029586d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 5132 bytes
font_01_sfnt_off000081a1.bin
f7b05576ebf753652bff384dac4987c3dcc402bf167d7d1f1be328836bda32ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A1 9416 bytes