Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbd161e89eb6332…

MALICIOUS

PDF

31.8 KB Created: 2020-09-12 22:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 727cd8b2f71e63fa0d9b225fbd4b2729 SHA-1: e2a02ead879255af86b78f30c19cf0849c2bdebe SHA-256: bfbd161e89eb63328e60313d9e0d09e78985eb9f21a6079a0c003436d999d1de
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also fires for PDF_SEO_LINK_FARM, suggesting a large number of outbound links, many of which are hosted on Shopify. The document body, though malformed, contains text related to 'Mega filmes online hd gratis' and the malicious URL, reinforcing the lure. The primary IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.club/wix?keyword=mega+filmes+online+hd+gratis
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/direbosolobetimofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/tinomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/12795244763.pdf
    • https://cdn.shopify.com/s/files/1/0439/0574/5051/files/framed_ink_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/wovawe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/8464888349.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/pevoliwimexagomizem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/fogemekaniwigeruk.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/72296914802.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/97989850579.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/85061996715.pdf
    • https://cdn.shopify.com/s/files/1/0466/2758/6213/files/aha_guidelines_for_stable_ischemic_heart_disease.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/sea_of_thieves_pc_game_pass.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_off0000409b.bin
cbc7db851a2175f2a7f575e307c62e318af9585cede335f5599d866dea74f8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x409B 5324 bytes
font_01_sfnt_off0000529e.bin
e453872ccf081fe0a3ff3dd04ec1884966ddc9d9fbef9aca77eded1aea1265cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529E 9480 bytes

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