Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbd428acb8d63ba…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 16:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed27f33dc4d77c65388d8342f9bdf597 SHA-1: 5fe167c594004827a46aa8ed65f9892eca2ebcbb SHA-256: 0bbd428acb8d63ba95917efceb52626d819140c07a2a9bdd594d88d2069dc0c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=learn+swiss+german+pdf'. This indicates the document is designed to redirect users to potentially malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest a phishing or content-scraping scam.

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.cc/pify?keyword=learn+swiss+german+pdf
    • http://files.navinpokala.org/uploads/1/3/0/8/130813696/8137505.pdf
    • http://files.funtravelescapes.com/uploads/1/3/0/8/130813588/90e63d58bd700.pdf
    • http://files.sustaininggrace.com/uploads/1/3/2/6/132680874/3757009.pdf
    • http://files.westtrailmassage.com/uploads/1/3/1/3/131398406/8723529.pdf
    • http://files.lgpristineclean.com/uploads/1/3/1/4/131452836/1101966.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/82194372591.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/vhdl_clock_divider.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/64307243323.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/bofikunekotelejaxutol.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/p90x3_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pazutebaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/estgios_da_doena_de_alzheimer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/bavalevut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/32020610097.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/vigipuben.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_off0000611b.bin
2162bdc4e1c328ff756c66508b2474cadef3a0749bf272e144beb091b5205876
pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 5360 bytes
font_01_sfnt_off0000735b.bin
8e5207493dc10e0fbe123d35edb4003701d5a8ae2ffd591c8c684461a20158fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 10648 bytes