Malicious PDF — malware analysis report

Static analysis result for SHA-256 29788692c29b9ec2…

MALICIOUS

PDF

48.3 KB Created: 2020-07-29 18:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31bfb037a80a9b2ec5d9833fe17aa30e SHA-1: 3e17b35cf1c51a3858ebde856ff66db1c357d4ad SHA-256: 29788692c29b9ec2085da0fe7664f6e22c868acf742dacfa935b08ec667bd54c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily corrupted, appears to be a lure related to diabetic food lists, a common tactic for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=lista+de+alimentos+permitidos+para+diabeticos+pdf
    • http://files.aspccc.com/uploads/1/3/2/6/132682295/75940.pdf
    • http://files.hramusicwest.org/uploads/1/3/1/6/131606984/1103597.pdf
    • http://files.solplaychildtherapy.com/uploads/1/3/1/4/131437677/9d6fa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/54657238529.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/petaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/30125765425.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/lizofixaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/85702521347.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/24414581410.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/56122501412.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/zevupebafabaragiduje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.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_off00007d2e.bin
60f8f8db2bf6c58b3e48cff7921a1c506b5f9b42ae6db20e037b76c9b6fd7a96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 5172 bytes
font_01_sfnt_off00008e98.bin
ffe16e28b7dbf5d898ccc249d6b43ca6ff335023efea53e0b5b743fd6c69703d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 10820 bytes