Malicious PDF — malware analysis report

Static analysis result for SHA-256 157e3702ab91e385…

MALICIOUS

PDF

167.5 KB Created: 2020-08-11 12:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d012aec60edd99fed33f04329941f5ed SHA-1: 0c1658a67d89c839c05fc17097892d56065153e9 SHA-256: 157e3702ab91e3852781d00d1ac97186da0fcbb0ee3230142046827d9e913381
134 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and an advance-fee scam lure. The embedded URL `https://ttraff.com/pify?keyword=bengal+famine+1943+pdf` is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristics, strongly suggest a social engineering attempt to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=bengal+famine+1943+pdf
    • http://jifamak.silkgallery.ca/uploads/1/3/1/8/131871674/xexipalejanij_bifezezomale.pdf
    • http://jiziwoge.drthelmatennie.com/uploads/1/3/1/1/131164211/fewemagerije.pdf
    • http://kajafadab.alexandrakcooper.com/uploads/1/3/1/4/131453574/pasevixeda-ledulisaker.pdf
    • http://files.matharteducation.org/uploads/1/3/0/8/130874400/ef1a27fc26e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/teriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/bijadopodavabug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/biometria_hematica_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/nifewapimefatir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/juperuwefoxizerobeno.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/2490269847.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/lexical_verb_and_auxiliary_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/85203198515.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/xevadujuwojarefetage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/22872514783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.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_off00024a55.bin
69be91619b2bfcedad62b103f64dae8a047cc8b1f060d9854ad5bbb1270da43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A55 5192 bytes
font_01_sfnt_off00025beb.bin
839422c8d4c1e01bc85752f4e59dec3052e7bc35ed60ac655474907d11795fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25BEB 11196 bytes
font_02_sfnt_off000281d5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x281D5 4324 bytes

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