Malicious PDF — malware analysis report

Static analysis result for SHA-256 638e966e087473e1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 03:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88f84d73ed0ec9e3d019a3b3fee50bf5 SHA-1: fea90342530cbe1780dc350740a0019376dfde06 SHA-256: 638e966e087473e1f75c7b249132151640638bb6cea7c50721e308a4c02041d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other platforms. One of the primary links, https://ttraff.cc/wix?keyword=scissor+lift+pdf, is identified as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=scissor+lift+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/18355160387.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/76086369895.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/cara_belajar_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/45891123402.pdf
    • https://static.usrfiles.com/ugd/b8c837_959b61ec5f3b49cfb7a88e3d73054a9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f0c469960c240d385b00df2245b4820.pdf
    • https://static.usrfiles.com/ugd/b8c837_1225a9ef6b364cad995240a823b438a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcab7a19a8c4699a21332e1b0c55be5.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/the_reasonableness_of_christianity_john_locke.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4158/files/bijafanab.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/puppy_dog_pals_colouring_sheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b35804b4e1b42b0b027bcbe58865553.pdf
    • https://static.usrfiles.com/ugd/b8c837_473943440a764100b3342c0fbc9bb6af.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006803.bin
a9b300923c7f7ae57991c09fad69694deecf5bc1bb337dd41a9878a3edc94394
pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 5040 bytes
font_01_sfnt_off00007929.bin
a773778eeb1fff4fdba63db8fa6963bcdc1de22991ffa7ba30fd9f8afa4d7823
pdf-font-stream PDF embedded font (sfnt) at offset 0x7929 10792 bytes