Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd3fc3b6d26527d…

MALICIOUS

PDF

34.4 KB Created: 2020-08-14 03:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2609032a591d3f1e56d1122e36008dc SHA-1: c69b929a065b9c77d915f84cad99df10e452d39a SHA-256: 1cd3fc3b6d26527d4420c97c27cfac0a26ecfe14fb82b170f8fb5b2cf2f1a744
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for malicious content. No scripts were extracted, and the PDF structure itself does not reveal further malicious intent beyond the embedded links.

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.com/wb?keyword=wings%20of%20fire%20book%2012%20pdf%20free
    • http://mozanufi.rudolfiartworks.com/uploads/1/3/1/3/131379578/sugafa-kujunix.pdf
    • http://vaxalazo.stjosephonekama.com/uploads/1/3/1/4/131407005/26c34b54b1fda5.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdf
    • http://files.maciejbielawski.com/uploads/1/3/0/8/130874539/209a765.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/29519132692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/jenotawexiwafujipaxilus.pdf
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/ivy_global_psat_practice_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1456/files/provisions_of_delegation_of_financial_powers_rules_dfpr_1978.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6808/files/excretion_in_annelida_through_nephridia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/voduwukiganipadimedaridez.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/mapa_argentina_rutas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/vector_calculus_marsden_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/70012802549.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/43773665830.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/setiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2825/files/89447499441.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_off000047e5.bin
cb3932c3ea246c0c3c7de9c5709574839f57f7567c73de55151a2cd8e087d560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E5 5368 bytes
font_01_sfnt_off00005a49.bin
ae81f0f614b57b1d65a736bfb870b0fe4805208d96bb675001396d75c924100d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 10260 bytes

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