Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a1363404123d4f…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 13:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b083b0bffcf4384e146ec996211223f8 SHA-1: 3bf7ce0daa8db36762fc8295af01f83d9edfc078 SHA-256: d8a1363404123d4f881986078d510f7ac31291de9ccc0ce3f644ff85edb6a251
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc) disguised as a training document. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF. The embedded URL https://ttraff.cc/pify?keyword=mental+abacus+training+pdf is the primary indicator of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=mental+abacus+training+pdf
    • http://files.wolfridgearchery.org/uploads/1/3/1/8/131857717/1069bd7202dc31.pdf
    • http://files.shophomegirl.com/uploads/1/3/0/8/130873893/tixolabumajadad.pdf
    • http://files.digitalmediaforlearning.org/uploads/1/3/0/8/130873983/jixesenenus-rujagifofenibuw-vukowuwodonut.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/mazatrol_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/tatakemeresipimajajozif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7556/files/5e_death_domain.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/97121884447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/lojanubonawenigufafer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1877/9815/files/lovulovutatano.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/playboy_magazines_worth.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/20935324002.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_off00007c2a.bin
7d15f9498f3768bbf089a8d8a30a81304f9701715c36f81930c63099eee6565e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2A 5468 bytes
font_01_sfnt_off00008ed4.bin
a813356e8087090dbf085b91d56b6d287acf1f0cfd87543b14caa22d931fbd43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED4 10528 bytes

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