Malicious PDF — malware analysis report

Static analysis result for SHA-256 574a953f06d19a3c…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 15:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5233c7ea6949c2d4e44336d2c96da965 SHA-1: 84e3e91f698a733f07fa5b7a3f06a33856abc19b SHA-256: 574a953f06d19a3c08a30842c4f9b2f8d7cea42e000f516520817e019f44fd00
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=business+english+audio+lessons+free', which is identified as a malicious redirector. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted from this sample.

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=business+english+audio+lessons+free
    • http://files.golnazbehrouznia.com/uploads/1/3/0/7/130740510/mowopexofegijewo.pdf
    • http://voteza.legacyofhealth1.com/uploads/1/3/2/7/132741194/pexujirimigufilebub.pdf
    • http://files.matthebert.net/uploads/1/3/2/6/132695401/gijaminoxowa.pdf
    • http://files.christinedevuono.com/uploads/1/3/0/8/130813973/8467338.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/pdf_amazing_grace_lyrics_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2097/files/92611051472.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/adventure_time_mortal_folly.pdf
    • https://cdn.shopify.com/s/files/1/0436/9681/6282/files/82391838931.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5110/files/classic_wow_tailoring_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/fikimaxubam.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/88319520116.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/6th_grade_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9200/files/auditorium_design_standards_neufert.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/20582052844.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/score_hero_cheats_android.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_off0000705d.bin
3e4084e2d3aaeb48c854eb4582a5a00cd0ffddd6b81f4fdc2bfb2bb669c47702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 5220 bytes
font_01_sfnt_off0000820f.bin
dbfb26cb7288412e0307e55caf5ed2f44b8eff2da526b2f70b2bbe606b6dc1f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820F 10212 bytes

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