Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1fd621ab8934fd…

MALICIOUS

PDF

36.1 KB Created: 2020-08-31 10:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44362a521efb3cba5819188a222cff38 SHA-1: 9ba789f108a2e7bf76fa60111571e663e71fca80 SHA-256: 0c1fd621ab8934fd3ef5a53b1f82c4f36bd5ac7bfd03dbc315c4b4f6a545fee1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=insinkerator+pro+333+manual'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to external 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.com/wix?keyword=insinkerator+pro+333+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/69525865009.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/27260342298.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/46215831213.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/88759788912.pdf
    • https://static.usrfiles.com/ugd/917232_d97624a30169418b99e82e2ed0dc48f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a132efa975a4f72b20008bd854b21ce.pdf
    • https://static.usrfiles.com/ugd/32acb1_2351f2d3b83d4de097e972dd78e45ad4.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/bridge_cruises_with_audrey_grant.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/44992180583.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/bupik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1185/files/factory_physics.pdf
    • https://cdn.shopify.com/s/files/1/0461/6093/7123/files/lemadupujederopezuv.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/11f207_3972d360fd0b4161a22c8e4dca7b9ae0.pdf
    • https://static.usrfiles.com/ugd/f96b02_b9eca0be256944a49597a1801cb59290.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_off00004fe7.bin
106c96aff61fedb74e350674c6fb57aa09e0549a8be95ad40decbdf5ef8b944c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE7 5132 bytes
font_01_sfnt_off0000613a.bin
18ff2ea3c904e52062c1a35436c4f1a0628383614b43baf6bc4e12800c34418a
pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 10104 bytes