Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cee1d2eb18ff37…

MALICIOUS

PDF

41.3 KB Created: 2020-09-19 16:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 739eca1c4989b3eb956994cfb6428424 SHA-1: dec54cbc2d236f967d84ce69ba40ca7d81d8913a SHA-256: e5cee1d2eb18ff37c39b24ff9d124d708033b269d4e28db345aa42301da7d384
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely used to host or distribute further malicious content. The document body, though heavily obfuscated, contains text related to 'linear equations golf worksheet answers', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malware.

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.me/wix?keyword=linear+equations+golf+worksheet+answers
    • http://jojimilo.caritascomics.com/uploads/1/3/1/4/131407995/netazugesoxukudukop.pdf
    • http://files.fordsauto.net/uploads/1/3/1/1/131164568/1591713.pdf
    • http://files.fliperentiating.com/uploads/1/3/1/8/131860787/ee13b5.pdf
    • http://kabajemi.staceyloper.com/uploads/1/3/2/6/132681352/zuvutaxekaxepowopo.pdf
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/7099975165.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/63616481716.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/18275824948.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/77246022960.pdf
    • https://3c52bd7b-66ed-45c4-a6ed-75846961072b.filesusr.com/ugd/66f3f9_3e4c283bb287473984cc4584ed496df8.pdf?index=true
    • https://faeae1ae-6f41-4a05-b01e-ce93c6a51270.filesusr.com/ugd/e2c223_8c91addfd9274f9fa6be7dbad5cc5e28.pdf?index=true
    • https://716c97b4-12fc-4036-aa3c-fb5a5e18ad0c.filesusr.com/ugd/1b8612_4275c99cc38f4267a87566b803626185.pdf?index=true
    • https://9651584e-0161-4ef4-9d74-23c076e1ddae.filesusr.com/ugd/760101_3a1e4f39d2f243f28e151265ff401134.pdf?index=true
    • https://610ee972-be07-4eaf-9cf6-f73dad7fffcf.filesusr.com/ugd/ab922d_be530a89959243d58d342b1425751e01.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/14345090689.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/5728299994.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_off00006352.bin
48a04694a2c16d73502793b991920e5b41a5bf522d8351b7764e264fcff65fb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5252 bytes
font_01_sfnt_off00007540.bin
23080c3edf6ca489168e25a9cac4352a3b0d6b3004d05af0885d207c5a81a534
pdf-font-stream PDF embedded font (sfnt) at offset 0x7540 10140 bytes