Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7af1ab395a4037c…

MALICIOUS

PDF

43.4 KB Created: 2020-08-07 19:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb7e414a3deb69d90f98d7f0751ee2c SHA-1: 716e62f6902b6623e089fc9078721938e46990b3 SHA-256: f7af1ab395a4037ca88befe60c58666ce45978fcc872c4da196348d3f4094d0b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=periodic%20table%20crossword%20puzzle%20answer%20key%20pdf'. This URL is likely part of a SEO poisoning or link farm attack, designed to trick users into downloading further malicious content. The document body also contains this URL, reinforcing the lure. The PDF also contains a large number of embedded links to Shopify domains, likely part of the link farm.

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=periodic%20table%20crossword%20puzzle%20answer%20key%20pdf
    • http://duwulerot.msfullersblog.com/uploads/1/3/2/6/132696021/396892.pdf
    • http://files.anthonybuada.com/uploads/1/3/0/7/130776594/vejedug_zifikipomupafi_kaguwile.pdf
    • http://files.healthyfeetkw.com/uploads/1/3/1/3/131381772/3063564.pdf
    • http://files.greatestcommercialtruckinsurance.com/uploads/1/3/0/7/130739713/ed19404b104.pdf
    • http://files.yogawithritamarie.com/uploads/1/3/0/7/130776591/vitilixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/sivimajodapajapesug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/repom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/go_ask_alice_beatrice_sparks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/8933741449.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/14204532370.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/40790502699.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/irs_form_8615.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/mufegeput.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/spartan_education_vs_athenian_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/xupufileborezij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/lufomikezodavi.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_off00006a47.bin
60f99e91c3ccea29be25f284cc9efeb8c157883caeb171086810b1aa4c105c3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 5596 bytes
font_01_sfnt_off00007d79.bin
2c2695dbac06c16f3201518f4b652ce103fbf0d168d0a8e2378f5b3cd3e96010
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 10192 bytes