Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb6606eaf821e57…

MALICIOUS

PDF

47.1 KB Created: 2020-08-01 07:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb4682581af2dfa6be6118347b35e0b SHA-1: 6096ace66f94ea9c2c6dd0112a19cc6fb3ab840e SHA-256: 0cb6606eaf821e57430d250e8795ba2475cda61a53eae05ee5ee3498e27c4911
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests an attempt to drive traffic to malicious infrastructure, potentially for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=postgres+list+databases
    • http://files.nicoleona.com/uploads/1/3/1/4/131452799/97649395683476.pdf
    • http://files.sligogreenway.com/uploads/1/3/1/4/131437093/8362627.pdf
    • http://files.hillviewchristian.org/uploads/1/3/1/4/131483317/5250584.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/jasiwekebutese.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/zutaxutejujutizutuxazujib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/nulogurifoxex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/rovisoruxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/apple_social_responsibility.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/mutorazazamakog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/xigomoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/80158069981.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/83907793839.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/30780488254.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/72443872643.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ef.bin
ad5a1b6143c38f6ef84b0ddf34583343dc817086e59596c7f2950d8210e9dbcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5132 bytes
font_01_sfnt_off0000756b.bin
144c999f231bce4af59332c922ab1d879388660beb8afb14bb8a2bf1a62575f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 10916 bytes
font_02_sfnt_off00009aa8.bin
1a51fac5cecc05d5f0a5d3b698ffe240ccab470cdba6a823ba27c6c2a12c20dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA8 16060 bytes

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