Malicious PDF — malware analysis report

Static analysis result for SHA-256 67526a3e580d3309…

MALICIOUS

PDF

51.0 KB Created: 2020-08-23 17:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 384d144cdceb5eeacdc2459c455c5c4c SHA-1: 2112320077eeb3e10de2caf72c6e0c99b0868fa0 SHA-256: 67526a3e580d3309dd62a3818488e87518ed26c15e6a6b003f0e1fd9546a9085
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for a 'data science cheat sheet'. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=r+for+data+science+cheat+sheet+datacamp
    • http://files.lpadalworth.org/uploads/1/3/0/8/130815277/e7e12376.pdf
    • http://bobowexe.inspiredemocracy.org/uploads/1/3/0/8/130873947/2455716.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0466/7070/8901/files/deadpool_foam_mask_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2341/files/email_icon_image.pdf
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/mudiwupetoxifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/alice_in_chains_don_t_follow_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/bol_chudiya_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0822/files/55482134351.pdf
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/febrile_seizures_plus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/69225808931.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fea.bin
2a35cb1eb72c10113a703d8ef52db7284a0b60513ed16f0377bddb800cd76039
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEA 5428 bytes
font_01_sfnt_off000082e0.bin
4ef8cad6d90854e75fdb2b4e636a5ff22584259cfa4ae99135f0a8c0b46286fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 5368 bytes
font_02_sfnt_off000094fb.bin
b737e62df82b5b43ca6e0c524605d23fef58a6dfb9f5c598136b2f6b5ac09d68
pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 13080 bytes