Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a6e7d1be8de1b8…

MALICIOUS

PDF

38.7 KB Created: 2020-08-14 21:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae45aa2230c0a435d06d4f7d4713c456 SHA-1: 59364d50ee1243cc548f6af50430c3cf8e1ff668 SHA-256: 00a6e7d1be8de1b8f32964a509685c7275d337ff42b30aba054ce3938505ccc4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/wb?keyword=substation%20design%20and%20equipment%20gupta%20pdf'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly indicates maliciousness.

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=substation%20design%20and%20equipment%20gupta%20pdf
    • http://rareto.paulaszzerts.com/uploads/1/3/0/7/130775217/4297771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/75608042885.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/80811131784.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/lezixisoluvatukuwaludek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9130/4343/files/campaign_sourcebook_and_catacomb_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/78597914407.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/goramivusukigule.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3479/files/tuxotojapowideb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/setowideduvuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/possessivpronomen_franzsisch.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/6854262971.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/11628861423.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/69016051661.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/windows_xp_activator_tool.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/synonyms_and_antonyms_for_ibps_po.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044f9.bin
7c3119cc32e65bb10d61f0390fad867041f30091ff01e6f801c1a2e408ca4583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F9 5600 bytes
font_01_sfnt_off000057e4.bin
2c5e47b20446ebc6596c7364e4069a9f776f4d0610dccaede381779137f1bc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E4 9488 bytes
font_02_sfnt_off0000783b.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 16164 bytes

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