Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d44d3920cbbc53…

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 08:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38db1509ac73dbc9d07fdc29472f4ab6 SHA-1: 98666e4085933e789c9c005b2c06563194ecdc95 SHA-256: f2d44d3920cbbc5396726d071ab441bcc913163619a0782ad589e7891d6bcd94
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a search result for a 'Harbor freight soda blaster conversion kit'. This suggests a phishing or scam attempt to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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=harbor+freight+soda+blaster+conversion+kit
    • https://cdn.shopify.com/s/files/1/0431/0994/1415/files/80356633728.pdf
    • https://cdn.shopify.com/s/files/1/0461/3675/4329/files/thickness_single_sheet_of_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3762/files/59821963736.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/vedutajufurijekutifidena.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/bigibijaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/gabekokonafagixemox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/52473556862.pdf
    • https://cdn.shopify.com/s/files/1/0434/5328/4519/files/murray_snow_blower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/calvary_temple_audio_songs_naa_songs_ing.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f8ae46630a4b688afbf3f941bb323a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6440e4b34fa44aa18d9dd6a34df21ee9.pdf
    • https://static.usrfiles.com/ugd/d162e3_ef2c7dd284424a90aee223e0bf620af7.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/xiwowajezogejivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/xosifaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/7248399670.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_off00005634.bin
17bc625adaa5c4f1abf54a7dcfd4344581927da5138814366ff9975d7d9cbc6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5634 5508 bytes
font_01_sfnt_off000068ee.bin
4f908433517ad0fb7ce15cd5502fe369df1e3637f2548f6ad8ca92aa307f05af
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 10244 bytes