Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a0a14525e89c68…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 20:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344cad4c26e5093de773b5a6d31a92f8 SHA-1: 2719892da0965c19225f1fd0c03d418ea50038fd SHA-256: 05a0a14525e89c68d05c3c5960ebad926b8d74007e4f0d60f23e627f778d9d66
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=notes+of+atoms+and+molecules+class+9+pdf
    • http://files.alphawomenscentermn.com/uploads/1/3/0/7/130740012/8f7ff23b.pdf
    • http://velunozan.lmcphoto.space/uploads/1/3/0/8/130874284/lowegitilo.pdf
    • http://files.ks-image.com/uploads/1/3/2/6/132682787/1577214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/star_trek_rpg_fasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/jekisogit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/zoviwanazegowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/tamelesikodewejaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipipopiluniwewikojidil.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/livimuzedanokabufilorid.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/sovodetinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/74960356764.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/4442374413.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/xowuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/35484018959.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/39363034955.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/dipixasazejopev.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_off000071e7.bin
d93d4f6c2ec966d0a0b58a35eaa5bb55e967b9816b80cf88af94aa6f8bc66faa
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 5328 bytes
font_01_sfnt_off00008403.bin
484a3a75aa1fe71873f65f886aa1bfa1a5752d7e207c552215a1cebb29291ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8403 9980 bytes