Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da250f1793ef53f…

MALICIOUS

PDF

41.9 KB Created: 2020-07-31 21:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd386c716a1efde59f5ef40cd3805a4e SHA-1: 89965c522ca29f6c21052167a2539abbd08eee48 SHA-256: 0da250f1793ef53f8f607af851b46495d703bbbda636f81bb31fb6afd7162f89
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection attempt. The primary malicious indicator is the link to 'ttraff.cc', a known malicious redirector. The document body text, though partially obfuscated, includes the same URL and title, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=create+gh-+pages+branch
    • http://files.lukalahfarm.com/uploads/1/3/1/3/131379894/bimozovi_tipoxikadali.pdf
    • http://files.ohmylashuk.co.uk/uploads/1/3/1/3/131398268/zigolawamu-lupaxa.pdf
    • http://files.tukteacompany.com/uploads/1/3/1/6/131606819/ribedafegu.pdf
    • http://files.tequilatoo.com/uploads/1/3/1/8/131871704/2073151.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/18838657784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/faxofux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6573/files/8843191629.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/jokerevek.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/96688264419.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/4840950318.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/fuzikonezubimasujabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/48105527354.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/niriluxuniwozipun.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/refizuxobusitozajafavas.pdf
    • https://cdn.shopify.com/s/files/1/0438/8365/9419/files/puwekazavofufawupawobogud.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/90528588216.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/tomawosokubonojotepifulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/sisaxiwij.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_off000061b4.bin
4b30869090c60d2b69e1f82f95201442aee510e3694d1186f80ae2034cfc3277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 5240 bytes
font_01_sfnt_off0000737f.bin
0e883b3e2d45825ed7e6d9995c9d8064af21c212a9b8e4daf0a4352ab46112cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 12052 bytes

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