Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b02d7b8609d2c5…

MALICIOUS

PDF

48.2 KB Created: 2020-08-30 08:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359e81f9d12cabb8739830b7f67f3b7d SHA-1: 1e3b6155114c8489f8128996fa9cf792fdbd1fcd SHA-256: 63b02d7b8609d2c5b66b24ee0dd33b0a6071c753c1a9a5f755c49970360e807b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to 'stardew valley commands' and the URL itself, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm, a common tactic for SEO poisoning and distributing malicious content.

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=stardew+valley+commands
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a2e20a_0bfbaf4c232c4ef4a172a2631b90ae49.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_ac704ad305ac46f6a6525efb7628d738.pdf
    • https://static.usrfiles.com/ugd/fd3290_46b00b2497aa452aae899d0954c698a7.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_058dcf4543224f0dbd20dc663f49c6ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdbfd45da51b41ff8c33ee0b174a7a53.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/pasefagonogilegita.pdf
    • https://cdn.shopify.com/s/files/1/0434/1628/9447/files/ejercicios_present_perfect_just_already_yet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/79310439118.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/lupabalelaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/tuwisugiduvo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/aha_guidelines_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/13371538340.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/wofimodujuzoralabibetep.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/stalker_sport_radar_gun_manual.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_off00007dc9.bin
aee44083333d00f92e1f5599444769051fccdd6575c4b80e6127b54e2e6f0043
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 5444 bytes
font_01_sfnt_off00009043.bin
e1d0644df8cd15a04088f72a36061548f4552b560821655f4c57e8d8ca5fb20d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9043 10692 bytes