Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a4eedaeac77740…

MALICIOUS

PDF

34.5 KB Created: 2020-08-02 14:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bb200d79be7e3361ecb3f8bd780a65 SHA-1: 8851892c2c410c8e1a15f264c7be4f220ad1ff1c SHA-256: b7a4eedaeac777401cdce1e8202ab9463cd4cc3177c7bce3e46a2097771a0147
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised as a physics laboratory manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many of which point to benign Shopify URLs, likely to improve search engine ranking for the malicious redirector. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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.com/pify?keyword=physics+laboratory+manual+loyd+solutions
    • http://files.ingridlavoiepapercutting.com/uploads/1/3/2/7/132740462/831a1abfdac1e.pdf
    • http://files.multiplicitycreations.com/uploads/1/3/1/4/131406321/gifavavedefek.pdf
    • http://files.smile-movement.com/uploads/1/3/2/8/132814463/1611b54cf6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/65455779462.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3479/files/55007541619.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/nizafolunagevoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/kilapebizuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/event_coordinator_resume.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2805/files/sirusefunizavofiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/80832459932.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/82665147332.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/28319481241.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/xufesaxemulomovomito.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.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_off0000491b.bin
504820dcbd703d59e226e67782753af9498c623ff50e96e5335822ab408ab735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491B 5424 bytes
font_01_sfnt_off00005b5c.bin
254751729e91c0d40087cbc36db2eada2df4f75b4d36482a09c66f1518237a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5C 9868 bytes

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