Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c6e59ebb6d464f…

MALICIOUS

PDF

38.5 KB Created: 2020-08-08 07:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26a9652bd06c29107a7b2ced25d6b5fd SHA-1: 80daf12c39da40074e877fc6ed90fcc664140e40 SHA-256: 85c6e59ebb6d464ff13b2771f6e3b86299a0a58762504983d72d0b87ef020fd8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body text, though partially corrupted, suggests a lure for free software downloads. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL points towards a phishing or malware distribution attempt.

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=pdf+splitter+and+merger+software+free+download+full+version
    • http://lovux.casasanimalshelter.org/uploads/1/3/1/6/131606407/6149252.pdf
    • http://files.paloaltoglass.com/uploads/1/3/0/7/130776054/puwawew-xijiluwovazew-vusabufubuzisu.pdf
    • http://nunivubo.endofline84.com/uploads/1/3/0/8/130814769/zofipuza.pdf
    • http://dufasuk.millenniumcleaning.net/uploads/1/3/1/6/131637136/7828097.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/20852670898.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/refraction_of_light_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/zowunemugopuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/metaphysics_aristotle_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/one_true_media.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/mosanorusigufudutot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/67217239084.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/zofetujozetisikowut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/masejazu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8452/8281/files/livros_apcrifos_do_novo_testamento.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/common_brazilian_names.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/136221467.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_off000056a3.bin
d6dbe7df52fb4214552fdca6c030235aa86277c76ef6d3735b8b733e05e2bfbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A3 5512 bytes
font_01_sfnt_off00006961.bin
2e71801b739a8f4c8ab123ea4c34e09c4e52ffae9f638be6cf09acbdbe3d6a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 10360 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.