Malicious PDF — malware analysis report

Static analysis result for SHA-256 2733ce42cdcfb43d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 06:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de7c5680739564ebd05700a4fe9a87b SHA-1: 07bba48408cc2b5392852bf9fa3eee6dc3b41a0a SHA-256: 2733ce42cdcfb43dc40f659c88ae225c91475a33cad6b8042e494b386f7b0175
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.com. This indicates the document is designed to lure users into visiting malicious websites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=bacteriological+media+pdf
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://files.adornationforlife.com/uploads/1/3/1/4/131407761/1449655.pdf
    • http://files.filmbandits.org/uploads/1/3/1/1/131164402/635f9.pdf
    • http://files.tlkpowdercoatingmalaysia.com/uploads/1/3/2/7/132740260/lapokifuj.pdf
    • http://files.donnysinge.com/uploads/1/3/2/6/132683165/1557313.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/gajovebakakukanuwetudif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdf
    • https://cdn.shopify.com/s/files/1/0447/3644/6613/files/random_number_generator_python.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/lamijoduruzi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/fufoxafujufuzike.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/vokut.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/88393036272.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/rekenavekezafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/34343469399.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/internal_body_parts_of_cow.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/96959720089.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/98918613248.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/79525503219.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_off000064b0.bin
c8ab381544ed5f79ce8afa484f7a1069f32152a296f9d934907d57c5b99687b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B0 5344 bytes
font_01_sfnt_off000076ca.bin
0f9e00db68e6eb1a4a41eceef3b485838fc576f71144be8e56ca20b300705fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CA 10116 bytes