Malicious PDF — malware analysis report

Static analysis result for SHA-256 31cdc8c12890cb07…

MALICIOUS

PDF

49.3 KB Created: 2020-08-13 00:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 744fd661144e17abab8bc46896348142 SHA-1: 3b5fe0918842c28d9735aebe0d72eb5b2df4d8db SHA-256: 31cdc8c12890cb07dcbdb3d67b97bb31d0a0e4c590d9bb6d4d7615238ebc274f
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body and embedded links suggest a lure related to 'anti corruption act pdf' to entice users to click through to malicious sites. The presence of a large number of external PDF links also indicates a link farm strategy, likely for SEO poisoning or to distribute further malicious content.

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/wb?keyword=anti%20corruption%20act%20pdf
    • http://zufin.wordsplusthoughts.com/uploads/1/3/1/4/131453870/bb024a3f49254.pdf
    • http://vasanuta.maineflyfishingguides.com/uploads/1/3/0/7/130739777/mezowefifebulivili.pdf
    • http://files.kramerjewelers.com/uploads/1/3/0/8/130874148/2687089.pdf
    • http://files.thesexminister.com/uploads/1/3/0/7/130738799/bilogoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/zukiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/52389029194.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/tasawuf_al_ghazali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0449/5795/8299/files/ccnp_labs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/95829265996.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/takeuchi_tb240_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/92938900792.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/kinipiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/verizon_domain_name_service.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_off00008373.bin
7e26a53f5002f418988acc62ddca444e46ded25980544a89107f77d11022a4c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8373 4928 bytes
font_01_sfnt_off00009442.bin
4aa0ba2f03db59809efccb5183b0d5bea9dcffb2bc2a1e5156549f2c644eaa84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9442 10500 bytes

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