Malicious PDF — malware analysis report

Static analysis result for SHA-256 94946604c83837f9…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 10:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1facf43cff23c90126263959a8386662 SHA-1: 81004f6f1fafed1a2543079488dba707521fd73e SHA-256: 94946604c83837f9188cce01c0bb18b7f1b2ffd0996719972d56476b439538b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a real estate report and the malicious URL, suggesting a lure to trick the user into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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=douglas+elliman+manhattan+real+estate+report
    • http://kanupofu.eatforyourlifetoday.com/uploads/1/3/0/9/130969627/madeferegogapu.pdf
    • http://files.alrajabahrain.org/uploads/1/3/1/6/131637553/8947c268cf526e.pdf
    • http://peled.northshorebostonrealtor.com/uploads/1/3/1/4/131483144/7514191.pdf
    • http://dewudo.legacygift-shop.com/uploads/1/3/1/4/131407227/9317855.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/red_belt_form_taekwondo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/power_electronics_based_projects_for_eee_students.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/84353706987.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/gurugutukajotiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/96838251000.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/kipimujonuzaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/19590671451.pdf
    • https://cdn.shopify.com/s/files/1/0447/8337/0397/files/organizational_structure_of_advertising_agency.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0876/files/trouble_maker_kpop.pdf
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/74371963904.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/que_son_las_bacterias_mesofilas_aerobias.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/belud.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c0.bin
855af0f28f447a3d8001da92efbfc1e9e6c2dc9410c7455da94dae68ddea7014
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5232 bytes
font_01_sfnt_off00007a66.bin
335c067c7cd379092f60510e65f087edf48cf432ecb8d949050668563532b429
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A66 10184 bytes