Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e3857ced034b86…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 09:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbe305c5c2757066c63b7d1b9f577f4b SHA-1: 87c8cff415f4ce394ceafa589de943db68e30cef SHA-256: 61e3857ced034b86477825859d02d6356688f7edc6c09882e808ad683f5f9508
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=scott+foresman+science+grade+5+textb
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/captain_america_first_comic.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/wizuwaleti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2655/files/nadulevifeweviwu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/jelamezeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/tapaxowikojefevomasafopap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/52718368212.pdf
    • https://static.usrfiles.com/ugd/b8c837_02fdf7ef2b034ecda35f0a51f9c8da88.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5dee3ed256d4d3ba68fd5e3a17e7059.pdf
    • https://static.usrfiles.com/ugd/b8c837_1816ed7f36b240ccacc5e447da034b88.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed20c1791e7246ed816be19494ce6b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_db44d48b000148709a23b730c690a1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b50bcbcf018438aa93353c7cc087134.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff482b99a2044902bd9b5e8ca62e7d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_130435c65c994bbf816c4a5175fcb2f2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004428.bin
b6028990ccd71e160a19e7941235cd6c2fca04ef991dc8837688fa641a069bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4428 5532 bytes
font_01_sfnt_off000056d1.bin
297424ba422c173a6a7be7932423a5a7d4e6687f9a1783b56109cbd553729a7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x56D1 10008 bytes
font_02_sfnt_off00007886.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 4324 bytes