Malicious PDF — malware analysis report

Static analysis result for SHA-256 686f1091abb55356…

MALICIOUS

PDF

42.2 KB Created: 2020-08-15 01:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e3c1775835929bfecef9467fd422c6c SHA-1: e5cd11a77bfa64975c498e0bcf68eb8e7ac8e277 SHA-256: 686f1091abb553565b03ad16211bb4fae33a647bff7f31be6162fb8408c37077
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=kathmandu+plane+crash+report, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a phishing or scam page.

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.ru/pify?keyword=kathmandu+plane+crash+report
    • http://files.maison-de-villars.com/uploads/1/3/2/6/132681028/3066463.pdf
    • http://xedofila.applause-tickets.com/uploads/1/3/1/6/131606186/jodazavosajadoluwor.pdf
    • http://kugew.revolutionpolefitness.com/uploads/1/3/1/6/131606490/tofupewowon.pdf
    • http://bujaga.clevelanddogtrainers.com/uploads/1/3/1/8/131860479/f341eed54c106dd.pdf
    • http://files.friendshiptoday.org/uploads/1/3/1/4/131437253/6250988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/51591548471.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/494593630.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/37023787746.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/66396065955.pdf
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/8220583819.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/2020_tamil_calendar_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/86919470778.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9144/files/xeratesikixulemu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/abacus_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/89641855825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0447/5479/6698/files/cards_against_humanity_expansion_german.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_off00006796.bin
d30fdc074eeae6d77e2b6637e29b8d15879f4ebd3ce578e0682299a7e6a64bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 5280 bytes
font_01_sfnt_off00007960.bin
3feefed9b803fe37a1c6f7aabfa12a4ce80cc7fe2e397bc0c482eb4e2fd78e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7960 9940 bytes

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