Malicious PDF — malware analysis report

Static analysis result for SHA-256 9906572c557bb85d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 04:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e574845b44f210ea40aa791245dec7bf SHA-1: 98e0777f87b5e06533c98f6fddabf53e0cc5e954 SHA-256: 9906572c557bb85deb14adbe1e101fd9be7dc13cb4afbe673d2d677e6008c0f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a learning resource, aiming to lure users to a harmful site. The document body and heuristics confirm the presence of numerous external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.com/pify?keyword=learning+javascript+design+patterns+pdf.

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.com/pify?keyword=learning+javascript+design+patterns+pdf
    • http://files.southeasthighlands.com/uploads/1/3/1/4/131438397/xusuzaso.pdf
    • http://files.yulupacoho.com/uploads/1/3/1/4/131406075/9076061.pdf
    • http://files.warrensimonsphotos.com/uploads/1/3/1/4/131407530/kijedorageripok.pdf
    • http://files.alphaesqcleveland.com/uploads/1/3/1/3/131384589/f27f2a.pdf
    • http://files.highwaysnhoofbeats.com/uploads/1/3/1/8/131856331/bitev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/contemporary_nutrition_9th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/66938949061.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/21634104665.pdf
    • https://cdn.shopify.com/s/files/1/0439/4228/1371/files/ruvawavofupowigopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/rekifijuluxidavemurakaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zamujogeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/30779784236.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6692/files/dowolalobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5813/files/vetedisulazanasalisedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/nosoxakifuvib.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/lijawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/jingle_bells_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/81625800188.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_off000068b8.bin
87f8b1b3c492fb0493e61d026a49c61751db53a213696843521e8593720c37df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 5368 bytes
font_01_sfnt_off00007b21.bin
5240858a32f452b425f84f139bdc6c134920e4d7c5483ef61754b513df1a301f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 10580 bytes

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