Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cbc6186a160a60…

MALICIOUS

PDF

37.4 KB Created: 2020-08-09 10:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9642949a5e8a994ae3a8e2633b2886fe SHA-1: 7cd0e4711d4082f9a3faeab59412ab46dc447767 SHA-256: d6cbc6186a160a6069b96cd5b32b22310c4e0b98aabd361f15771ca62a8450f9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=atrrs+course+catalog+pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or content-loading mechanism designed to obscure the malicious redirector. No scripts were extracted, limiting the analysis of further stages.

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.cc/pify?keyword=atrrs+course+catalog+pdf
    • http://files.eswirdeinmal.com/uploads/1/3/0/7/130774990/tusukonigi_tozijufem_luroveguz.pdf
    • http://files.ktjo4x4.com/uploads/1/3/1/3/131383837/59fb35810067b.pdf
    • http://files.laromas2go.ca/uploads/1/3/1/4/131453177/bixurusagafew_tizas_wevuwawajutuwa_rasotopaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/useful_chinese_characters_for_learners_of_korean.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/management_13th_edition_robbins_and_coulter.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/93909682913.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/55272886113.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/loxix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/sogunidewiloped.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/96719800924.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/956263800.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/41131372832.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/visual_c_redistributable_2005.pdf
    • https://cdn.shopify.com/s/files/1/0428/9855/5043/files/2410824129.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/14993741702.pdf
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/1950141811.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_off00005497.bin
b3957e213501bddb56b111add1ba84070d5bd7e6038006c5bf4e3414f1781b46
pdf-font-stream PDF embedded font (sfnt) at offset 0x5497 5312 bytes
font_01_sfnt_off000066bc.bin
186708298ccb50c736b852ad996e0c50e512b8601a58924aad48637b203dffd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BC 9988 bytes