Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90983b0dae910da…

MALICIOUS

PDF

51.0 KB Created: 2020-07-28 19:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 714b5e83b8b8af4718ec29fa09e2a8c4 SHA-1: a9e43717a674e9332671ad9cbd981cb3c85b1059 SHA-256: b90983b0dae910dab0daf8743bd1b0412dd3cc5c22879ae87d794470ab2d7063
120 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 Shopify. One of the primary links redirects to a known malicious domain, ttraff.ru, which is likely part of a phishing or scam operation. The document body, though heavily obfuscated, appears to be related to 'examples of difficult situations at work answers', a common lure for phishing content.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=examples+of+difficult+situations+at+work+answers
    • http://files.oaklandchristianchurch.org/uploads/1/3/0/7/130776483/wozazonekuki.pdf
    • http://files.usveteransmcma.com/uploads/1/3/0/8/130813135/8219166.pdf
    • http://files.colourtherapybylorraine.com/uploads/1/3/0/8/130874086/tajipimu.pdf
    • http://files.bbf-cafe.store/uploads/1/3/1/3/131398573/a537f7e.pdf
    • http://files.africanlookingglass.com/uploads/1/3/1/3/131380258/2443953.pdf
    • http://files.colourtherapybylorraine.com/
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/49096120766.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/31177278856.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/xawasigipasizinanaxef.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/72657357186.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/midunatuxatotitixisude.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/83353156754.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/posefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/28413678140.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/xenedexujifokugebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/65273908176.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/miwosinemamaxumojeteti.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/38661752065.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000752a.bin
6c8c5e1f45bf21b393e1e0a1d19855191d0995c9013ae6895060baf7fe1392ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x752A 5364 bytes
font_01_sfnt_off0000876c.bin
6544cbe7057a7806ec94ed5fcd1ceb763abd2317c6e51d809d53d1819b9398a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 9648 bytes
font_02_sfnt_off0000a88b.bin
069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA88B 16376 bytes