Malicious PDF — malware analysis report

Static analysis result for SHA-256 02830eb874eab2c1…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 06:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccccd30fb515af95c0557a5245134bc7 SHA-1: aed3918226157e84c0f48fe9ddeffd144b48ca99 SHA-256: 02830eb874eab2c17a6a1f12bde1dd39dd4a704f223f054bc08b550ecbff5d71
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 redirector infrastructure. The primary malicious link identified is https://ttraff.cc/pify?keyword=women%2527+s+saucony+guide+iso+running+shoes, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to product names and URLs, suggesting a lure to a malicious site. 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.cc/pify?keyword=women%2527+s+saucony+guide+iso+running+shoes
    • http://tewajij.emmauswellbeingmatters.com/uploads/1/3/0/8/130814788/losimadijimoziruki.pdf
    • http://files.realmagicroadshow.com/uploads/1/3/0/7/130775635/9426746.pdf
    • http://files.obviouslyavi.com/uploads/1/3/1/4/131454771/voxurida-dadutiresida-mumizulufonujiv.pdf
    • http://files.apexhighband.org/uploads/1/3/2/8/132814050/refezexeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/54263249787.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/xapunubamagivuriweja.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/zujoligubigizafiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/15457982390.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/battle_royale_2000_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/baldur_s_gate_dorn.pdf
    • https://cdn.shopify.com/s/files/1/0455/3284/0101/files/civil_engineering_building_materials_and_construction.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/access_control_system_training.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/likebovupegizexov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/52616959671.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/vizio_remote_code_for_directv.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_off0000554d.bin
0923098f01d50564b0e2d12714f57b48f9f7ccfff273d24badc4019d7635ff9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554D 5272 bytes
font_01_sfnt_off0000670d.bin
efeee4bd2fd4ad99f17bba07f297017fbf446b3247a2af7b1dc1d0779e9eee9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670D 10596 bytes
font_02_sfnt_off00008b4a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4A 4324 bytes

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