Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf44a611debb3b5…

MALICIOUS

PDF

71.7 KB Created: 2020-08-12 06:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88c0d2827fe2c25fc1627ac29ab3e366 SHA-1: 1be6883e4087c77512340368f947ba5ca0ffebb2 SHA-256: abf44a611debb3b5e23e9b64b48a486bc947071fa42ac12225612fa7c3d8828d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=analog+to+digital+converter+block+diagram+pdf'. This link is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, some of which are hosted on Shopify. The primary malicious IOC is the ttraff.com redirector.

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.com/pify?keyword=analog+to+digital+converter+block+diagram+pdf
    • http://files.region2soccer.org/uploads/1/3/1/8/131871919/9080219.pdf
    • http://files.soulsurvivorsband.com/uploads/1/3/1/4/131483153/zotovojebago_sunuw_gatik.pdf
    • http://fufagaj.srmadr.com/uploads/1/3/1/4/131406082/lekizizagigi_kexurulifevum_napabi_mebezasef.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/addition_and_subtraction_with_regrouping_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/66901643036.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/vataradigikijidosafevixat.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/wowekozuwolabaxipit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/17691670407.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/putting_on_sunglasses_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/30178109256.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/fojutorivituxizejabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.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_off0000c350.bin
9a7ab3279ac054f1db42611475106a29cf28cec68c10f6ee42256908eb7f5733
pdf-font-stream PDF embedded font (sfnt) at offset 0xC350 5552 bytes
font_01_sfnt_off0000d61d.bin
36832730a116c60131fc0147bbb2b32d98f42912b7ae728addd1d8776cb3a26c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61D 11228 bytes
font_02_sfnt_off0000fc65.bin
77905ff9885e60cfff17cf33ad9da418757c231635603c6b4cc239c84c233917
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 16064 bytes