Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cba5d02385cc48…

MALICIOUS

PDF

39.0 KB Created: 2020-07-31 20:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929cfcd68b42c82eea2682512138fda1 SHA-1: a2109eb53eb4d1fbe67122d75d62de25817f5784 SHA-256: 41cba5d02385cc489ba40f38f6358516fb8fd24539e47a0d4cceb24854a6815e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=yamaha+moto+4+250+manual'. Another heuristic flagged the document as a PDF SEO link farm due to the mass of external PDF links. The document body contains garbled text but includes the same search query as the malicious URL, suggesting a lure for users searching for specific manuals. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=yamaha+moto+4+250+manual
    • http://files.lakecountyiltransition.com/uploads/1/3/1/6/131637928/3933337.pdf
    • http://files.forkliftpartspro.com/uploads/1/3/2/6/132696112/082c48.pdf
    • http://files.vintagechicanew.com/uploads/1/3/1/4/131437889/gatigin.pdf
    • http://files.acracademy.com/uploads/1/3/0/8/130873855/difev_metesegulusa_waxadetavesivil_weneporagoweduj.pdf
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/44212136484.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/miwoxonigades.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/56921882600.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/nosipifebitur.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/jebijas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/22793501800.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/bojikuloretalovitawezizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/70559812426.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/mivulerukisapomakazip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/49310113051.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/54268505007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ae.bin
cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x50AE 3312 bytes
font_01_sfnt_off00005c8f.bin
3c36b12e64e0c5a58686dadcd17d10bc635546ca804f4f78b6eba79b431965b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8F 5100 bytes
font_02_sfnt_off00006dcf.bin
eaf3baa4b7effb1cab1a966a6000a01333b832ee72f11dc305feff2afe77948b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 9656 bytes