Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed1628828a34031…

MALICIOUS

PDF

47.8 KB Created: 2020-08-28 00:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76429f4ea604035a102156d040924628 SHA-1: d729b5b2b379604dfa6fc675a7fdbc97e908ab03 SHA-256: 3ed1628828a34031e68ed3b7c0dd1266ea9fd764fff6de0232535681aeef5dc9
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=proceso+de+fresado+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing a PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong 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.cc/pify?keyword=proceso+de+fresado+pdf
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdf
    • http://files.coachingandcounsellingottawa.com/uploads/1/3/2/6/132682171/a7c809e31ec35b.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/91910664106.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/31134835725.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/87114209686.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/fejisogigajujexipije.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7221/files/awd_manual_cars_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/fabowafajixap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/able2extract_professional_to_excel.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/cartoon_football_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/3331100820.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45598155969.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/pogiwug.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/bhagavad_gita_chapter_17_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/16848070570.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_off00007ab6.bin
9f46711d8ccfa99fed9b7739ce730537cf01e00d6bc5b678bfcce5fea37eff7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 5116 bytes
font_01_sfnt_off00008c25.bin
8a489227a7a0b744395931b9bac5bd60ebabafa0fb2725a52478cc4d68479d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 11448 bytes

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