Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fc3d62ee12c6d3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 01:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa93434958d0622b56fc79e3533eb98 SHA-1: d5da91926fd4734792ea47f4a8877f19bfd0d901 SHA-256: 22fc3d62ee12c6d3b4a7c61c78bd5e4d23fbb98c6eb8a78154e90ce0e7982d39
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/wix?keyword=elite+dangerous+passenger+mission+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure under the guise of providing a game guide.

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=elite+dangerous+passenger+mission+guide
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/static_gk_capsule_ibps_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/limugotipisexilazakiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/tomozedisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/37826422894.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/28108377642.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/93438869732.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/aggiornamento_android_9_pie_samsung.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/autocad_plant_3d_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0450/7369/4872/files/attached_by_amir_levine_and_rachel_heller.pdf
    • https://cdn.shopify.com/s/files/1/0462/7041/4999/files/zoxofurog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/male_chastity_a_guide_for_keyholders.pdf
    • https://cdn.shopify.com/s/files/1/0452/3006/3773/files/energy_pyramid_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/61657411825.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/dotex.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_off00005f7d.bin
67ea2c3edae0c0c5940ad9d13219fc0ecca5d05636976d7aeef0f0d4c91d28fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7D 5236 bytes
font_01_sfnt_off00007131.bin
65fbc18e433bdfe44fb1b44b799362c7ae4be737fedc1964c4fddce26a16fc90
pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 10444 bytes