Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a2b3f437b756e5…

MALICIOUS

PDF

48.8 KB Created: 2020-08-25 08:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a242d13cadd867df8fbb60593c84d84 SHA-1: 687c141841019e25fd721a48119dddf323ac6848 SHA-256: c3a2b3f437b756e56c33c5999a5d5d083ae33b2e15c2c2395218265f87f83d2c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=formalit%25C3%25A9s+greffe+cession+de+parts+sci'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign but linked PDFs. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the payload beyond the initial redirection.

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.com/pify?keyword=formalit%25C3%25A9s+greffe+cession+de+parts+sci
    • http://files.powdermillbusinesscenter.com/uploads/1/3/0/9/130969440/4972888.pdf
    • http://files.bathcorporateactivities.com/uploads/1/3/1/4/131483336/netaximo_zabunepeva_zoditamitikitax_kedamamolu.pdf
    • http://files.misterszymanski.com/uploads/1/3/1/0/131070538/9740317.pdf
    • http://jideted.professionalpolishingtouch.com/uploads/1/3/0/7/130740465/1909768.pdf
    • http://povok.granthamfoundation.org/uploads/1/3/2/7/132740585/zijokunufabalil_xawebezejed_matemonagaba_rotopabukademin.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/application_octet_stream_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0438/8365/9419/files/difojojuwono.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6791/files/jasotibusamo.pdf
    • https://cdn.shopify.com/s/files/1/0454/6953/2310/files/adda247_approximation.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/87945010110.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/bunoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/98156181681.pdf
    • https://cdn.shopify.com/s/files/1/0436/2217/0787/files/29736598368.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/84146597545.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/army_of_darkness_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/womusovurixelasikelewo.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_off00006ef6.bin
f8e63c63c8af9c1b2a62886e00559f997c63305724028663a73fc12505bb5a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 5360 bytes
font_01_sfnt_off000080ce.bin
3dbe1e65f257b3c6ac97adaa6a3d29c01f837790988d1f4433aa50e048cb2dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x80CE 11708 bytes
font_02_sfnt_off0000a5e3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 4324 bytes