Malicious PDF — malware analysis report

Static analysis result for SHA-256 020055415abc99e6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-25 01:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e2f12257bb029e2ade20d852b9dd95 SHA-1: d45662845307838c3eee3da8d5db78fc4f97fd37 SHA-256: 020055415abc99e6cb596fce5c7b8b5bb714b77f2986bec41838a0cacf1a560b
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ashby+full+movie++480p'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify but some point to unknown domains. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest an attempt to direct the user to a malicious site, likely for phishing or to download further malware.

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/pify?keyword=ashby+full+movie++480p
    • http://files.attitudedancecompany.com/uploads/1/3/0/8/130813630/sesipiguw.pdf
    • http://files.hartskihill.com/uploads/1/3/0/8/130874403/dupesiset.pdf
    • http://xopuvepaj.polish-translation.org/uploads/1/3/0/7/130776757/bixib.pdf
    • http://files.ceylonboutiquehotels.com/uploads/1/3/1/8/131872070/vobomikuwokiwu.pdf
    • http://files.naobidetroit.org/uploads/1/3/2/6/132696335/ed943b68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/template_ppt_gratis_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/78895412255.pdf
    • https://cdn.shopify.com/s/files/1/0435/3130/5112/files/42246692209.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/bigibijaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/68092770960.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/nisozasoxizarovulitig.pdf
    • https://cdn.shopify.com/s/files/1/0444/3540/7014/files/coefficient_of_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/gabion_wall_construction_steps.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/77551250658.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/jifudobatupudomaxop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/gefewuzimovojikabak.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_off000063e5.bin
088d6f6261aa52a1636f9cc5e7fe37e5f7928818cc689c3d3c37e3c78e5f54c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E5 5552 bytes
font_01_sfnt_off000076b6.bin
a25b2d84562bf123c2c76e3c570ca6b595bff2939ea049a83030aa4718814f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6 15336 bytes

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