Malicious PDF — malware analysis report

Static analysis result for SHA-256 905bc3f95bf3923f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 18:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eedaef4bd2f74757565cfdad0f6717a2 SHA-1: c6725a8c1fc363465ba9731790a46f897ba73c74 SHA-256: 905bc3f95bf3923fd5bd806efd09d84a945512b4146415ffe6630a4dbadd2f1c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to templates and the malicious URL. The primary attack vector appears to be luring the user to the `ttraff.com` domain via a deceptive link.

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=paper+buntings+template
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/fokaxutubenese.pdf
    • https://cdn.shopify.com/s/files/1/0462/7198/7861/files/45663070503.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/atrahasis_epic_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/12638649007.pdf
    • https://static.usrfiles.com/ugd/b8c837_241b7401b0894806bcb139ab019b1ac7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9917c9cbb9e4bf196e4486231ebc13f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a00b39fa349240669eb7eb1927b1ac20.pdf
    • https://static.usrfiles.com/ugd/b4609a_278f7e094a5640adb480aa0ef42b3432.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d1f8fe4a33d46089843b871d05a5bbf.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_cfa4fc4c262d45eab06351aad7b96e91.pdf
    • https://static.usrfiles.com/ugd/aff7ca_9189977627554eddb7d33d3f68ce2b82.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce0eb75b390749449b9ce8ebc3cee67d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdf
    • https://static.usrfiles.com/ugd/3cb679_ec1c73d690344e7ab9a605dbc474b8b4.pdf
    • https://static.usrfiles.com/ugd/f3cb45_7c801ac01d6646e185fb82ec0963be1a.pdf
    • https://static.usrfiles.com/ugd/33a16d_3f6208e6d07f428185eef3c18f3b6d73.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_2df6edf965214377b09a8d3725052483.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_off0000632a.bin
f6f0ef671ab759fe94a524d995a78a61a03d3d79dff1b211337088d68de65798
pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5280 bytes
font_01_sfnt_off00007506.bin
669e3f92b8a8da9e06629cee173940a083664bc3cff36a4d99ff9e82b15e2086
pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 10192 bytes