Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d7ebf2e06af37c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 13:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb5fe968cd2337326014f806c2d67c7 SHA-1: 0273c53369e5d08172356819eb466036a784cdb2 SHA-256: f2d7ebf2e06af37ceeeca609ddcd8d132eccb9a2e1b47a3c487fa0cbfef94ccf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=vidmate+app+free++2014', is a known malicious redirector. The majority of the other links point to a link farm hosted on Shopify, suggesting a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, and the document body was largely unreadable, but the presence of the malicious redirector and the link farm strongly indicates a phishing or redirection attack.

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=vidmate+app+free++2014
    • http://zeziz.dianebattistello.com/uploads/1/3/1/4/131438177/2df10e3f.pdf
    • http://files.factsoverfeelings.org/uploads/1/3/1/4/131406222/4398068.pdf
    • http://files.brendahodnett.com/uploads/1/3/1/4/131454051/kemunojak.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/ravigekururosanowaviveze.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/textaufgaben_brche_multiplizieren_und_dividieren.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/chris_brown_loyal_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/37243911846.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/taluwut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/xasarevofefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/35284422329.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/29707787208.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/95672490603.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/resume_format_for_applying_job.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/butezedudoxadim.pdf
    • https://cdn.shopify.com/s/files/1/0443/1475/5228/files/keto_diet_shopping_list.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006092.bin
9b4448fce75d93f6b8992478e9dd77ef3014e2532c355f7fa76b6a07c0937a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6092 5356 bytes
font_01_sfnt_off000072bd.bin
45518f3e54b4766ed709f1d3b8001e578aff663843aad63860f50d67293c4b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 10012 bytes

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