Malicious PDF — malware analysis report

Static analysis result for SHA-256 09efee911380e629…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 06:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777efdfe94a5b2556b2b7358120e11e1 SHA-1: 0bc0fd8c15ba27ca2819ce5b933c9608d9ef1f1f SHA-256: 09efee911380e629febfcc4a7ed6d10ecca84c9660015b5f49573b11995f5d9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for users seeking a "sectional aeronautical chart legend pdf". The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

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/pify?keyword=sectional+aeronautical+chart+legend+pdf
    • http://files.lrcommunitydevelopers.org/uploads/1/3/0/7/130740090/kipozuwepokatevazab.pdf
    • http://files.myfreedomfellowship.com/uploads/1/3/2/6/132681264/2111424.pdf
    • http://files.kraftart.com/uploads/1/3/1/4/131405977/4865789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/najagegosafudo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/buckling_of_columns_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/msi_afterburner_remote_server.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/91845283981.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/pivukegogizaregiluguj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/buns_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/basurosem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/65308033076.pdf
    • https://cdn.shopify.com/s/files/1/0429/7162/7673/files/sivasijojerul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/49162816829.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/expanding_tactics_for_listening_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/75257639448.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f6.bin
ac13b061a9d78fb266534b80fe8eb2a758196f5a8a8b9addfca86eaa59aab1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 5340 bytes
font_01_sfnt_off00007811.bin
47dad883a9e62fa7dbe2516ad1749ab5489d682de5d23f48e91cbf39b7353036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 9728 bytes

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