Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ee75d0a7a5910e…

MALICIOUS

PDF

66.5 KB Created: 2020-08-04 20:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c79c368d3ec21878124163857c65e3 SHA-1: 4a7f39d157270a69063d6ca3d433b247e40032d7 SHA-256: 13ee75d0a7a5910ea19518cdebcf181daf24cc0ab3a0f216974d1c1b02dfad88
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL https://ttraff.ru/pify?keyword=nmr+of+proteins+and+nucleic+acids+pdf, which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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=nmr+of+proteins+and+nucleic+acids+pdf
    • http://files.efungpstours.com/uploads/1/3/2/7/132740270/8455354.pdf
    • http://files.urbanafineartscenter.com/uploads/1/3/0/8/130874104/seweji_nexitatibabax_bupanolato.pdf
    • http://files.oloppinnisfail.com/uploads/1/3/2/7/132740978/bavoxefilewux_lifenamagudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/mozometogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/les_anticoagulants_oraux_directs.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/sony_move_maker.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/voiced_and_voiceless_sounds_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/10304374757.pdf
    • https://cdn.shopify.com/s/files/1/0431/8566/8255/files/89875454636.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/nolimimomir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/fazabibovamakiful.pdf
    • https://cdn.shopify.com/s/files/1/0433/3820/3290/files/nobuvuripa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/91289791694.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/85102708648.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nijasanito.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/78575570791.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_off0000c607.bin
19ce47e880f743bfa710d6f7bbd5e49d1e9a039b0e527c6916f949b93950966f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC607 5268 bytes
font_01_sfnt_off0000d7de.bin
c2f1bf813d66bacf30631bd8b0fa7eb15e69c481fcccdc2d12d96ab5b9a5528c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DE 10768 bytes

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