Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e595f917e09f208…

MALICIOUS

PDF

48.2 KB Created: 2020-08-16 23:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b1bedec3f47ed44713e907cbd8c6ccf SHA-1: 7ac158d720d9a2aaae82c6604ca0e1f82bd19b52 SHA-256: 5e595f917e09f208801d91466e0e2edc778007a4f5a09614000004eed896182c
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 of which point to link farms and redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=the+universe+colonizing+space+answers, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise its malicious nature. The ML classifier strongly indicates maliciousness.

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=the+universe+colonizing+space+answers
    • http://girotepi.airbreather.net/uploads/1/3/2/8/132814930/12ad0.pdf
    • http://files.imaginationplayhousesf.com/uploads/1/3/1/6/131607063/pevinibupejoru.pdf
    • http://files.yourresidenthistorian.com/uploads/1/3/0/8/130814596/6213931.pdf
    • http://files.globalezorder.com/uploads/1/3/1/0/131070583/3010899.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/97344269535.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/spectrum_cable_tv_guide_dallas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/34092063832.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/48542645648.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/zalibevenuvuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20880330559.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/metafsica_aristotlica.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/80255865969.pdf
    • https://cdn.shopify.com/s/files/1/0435/8186/6143/files/tatta_hitotsu_no_koi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/filevukonidotel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007056.bin
b7baad416d1cfbce7e95bd3588f6b988d4482952cf623c0aad98add75834f266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7056 5148 bytes
font_01_sfnt_off000081e1.bin
e0681a55c3506dcda260aac6e7935b38d2a51fbfdedb57280b16ebe3fcc23c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E1 10436 bytes
font_02_sfnt_off0000a59d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA59D 4324 bytes

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