Malicious PDF — malware analysis report

Static analysis result for SHA-256 140458de72fc3231…

MALICIOUS

PDF

65.4 KB Created: 2020-09-02 05:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec401b9a7183807cf67f90b0b83513ca SHA-1: 2dca3b404b4c8d3a415531cfad79152a7d692fa3 SHA-256: 140458de72fc3231b37c348f4c71bb82bd1e619b09d09c1c2fea88bd0879d207
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru' disguised as a free Punjabi song download, which is flagged as a malicious redirector. This indicates a phishing or malware distribution attempt. The ML classifier also strongly suggests maliciousness, and the presence of embedded URLs supports this. No scripts were extracted, but the document body itself contains the malicious URL.

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.ru/wix?keyword=punjabi+boliyan++free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/1767559258.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/46540512723.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/powomobepenop.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/relinebidexoganakimepil.pdf
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/archie_comics_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/6707047303.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/19293870268.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9207/files/bandook_chalegi_song_pagalworld_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/foxunikelemir.pdf
    • https://cdn.shopify.com/s/files/1/0462/2680/0791/files/mafalda_tiras_completas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/vefokowenolejobef.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/91788455043.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/baruxunakidomosodem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/11803505440.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_off0000bbfc.bin
44f452e9126f721209a8036e73e7ce78b995008199b569f451c922a8db354019
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFC 4900 bytes
font_01_sfnt_off0000cccb.bin
e4e74598f3ef3d22f310843ce4173eb0698bc14e9b4ac3b0459b3d1bedd3c3b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCB 14068 bytes