Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d986bfa77f4603…

MALICIOUS

PDF

46.9 KB Created: 2020-08-07 06:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653e48312cb1493fd7572de7b5be1a4b SHA-1: c7c19ffb09290ec85aaa0eee873b4a1f5750ff09 SHA-256: 31d986bfa77f46039420a3565f0f90b9746adcf058d4372bed0e0017c83fed1c
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. One of the primary links points to a known malicious redirector, traff.cc, which is likely used to obscure the final malicious destination. The presence of a visual download button further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+calendar+calendarlabs.+com
    • http://files.ndmbfc.com/uploads/1/3/1/4/131406592/lomenemimudakafizi.pdf
    • http://files.amscanmanufacturing.com/uploads/1/3/1/0/131071258/nifadavewepodog_babomamudag.pdf
    • http://files.ginacampbellemdr.com/uploads/1/3/1/3/131379696/vosibefopenixasodoz.pdf
    • http://files.mhsorchestra.org/uploads/1/3/0/7/130776499/lekifimudavuwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/tovedibagedovodawikesofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/introducing_sociolinguistics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/compiling_using_libnx.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/cambridge_primary_progression_test_stage_6.pdf
    • https://cdn.shopify.com/s/files/1/0450/2428/0726/files/samsung_refrigerator_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/daum_net_login.pdf
    • https://cdn.shopify.com/s/files/1/0438/5990/2624/files/86800413402.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/lowuxagikawagepolufawa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/vb._net_read_csv_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/lopam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2629/files/50588026930.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_off000063d5.bin
e45f55769970a513bb4914e57f73164df6c716e4a6f751623b11bc05668dd63a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 5340 bytes
font_01_sfnt_off000075ec.bin
9953173891cf60281fb1e8d1a7427d1a5c29d82803171b0e31de8e575707b092
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 10488 bytes
font_02_sfnt_off000099b7.bin
97e80cc61ebbc6fe4ed03ffd5a5ae1d184ef07adb4204580ef84f3eb02720edc
pdf-font-stream PDF embedded font (sfnt) at offset 0x99B7 16108 bytes