Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41720a995486886…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 16:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e208d3fb3eef7b90cd7b179086255a SHA-1: eb47b120862c824fdc30ce1ee8d4c22448cd0cc6 SHA-256: b41720a9954868869a488d1ae85a7a3b6fa25c3571d4d6017c459ab2bd4d323d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated but contains the URL 'https://ttraff.com/pify?keyword=abbreviations+in+english+language+pdf', which is also listed as a malicious redirector. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute 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/pify?keyword=abbreviations+in+english+language+pdf
    • http://files.essenkitchen.com/uploads/1/3/1/3/131380083/gosojakavegiwa.pdf
    • http://files.sweetcheeksbyjulie.com/uploads/1/3/1/3/131384573/8297717.pdf
    • http://zozidejoj.trailwaybrewing.com/uploads/1/3/1/4/131452883/3339489.pdf
    • http://files.rcfenceanddecks.ca/uploads/1/3/0/8/130814611/xagejozav-poxirukezijepel-lufifuwuwerolom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/82219134363.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/side_by_side_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/remopibitexiporerife.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/18164037655.pdf
    • https://cdn.shopify.com/s/files/1/0433/9050/1020/files/jiborazevezuwomekedi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/61326291822.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gopag.pdf
    • https://cdn.shopify.com/s/files/1/0437/8974/6337/files/xoxekujomesiweges.pdf
    • https://cdn.shopify.com/s/files/1/0431/0243/7527/files/anemia_aplasica_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/41355304999.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_off000060ad.bin
2bd64da1e37855f5767c8f619833d8563afe2b9a0af844d3d792a795186abaaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5492 bytes
font_01_sfnt_off00007357.bin
d81d19b5b2a9af584c5d2d986ba25b024f2a06c936302eb34239854734ea9bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 10096 bytes

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