Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f53535639482756…

MALICIOUS

PDF

50.5 KB Created: 2020-08-09 15:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ac1e3487e89f5b7fdda06d2ff36812 SHA-1: 5d88cf76991bd5675a7d69503c710b9aee8e169b SHA-256: 7f53535639482756b99b38baa30c76c20b717f04681bca5033b0f2fd2787cdc3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged as a link farm. The document body, though heavily obfuscated, contains text that suggests an advance-fee scam lure, consistent with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/pify?keyword=marketing+research+pdf+sample
    • http://kodogojek.feliceabarr.com/uploads/1/3/0/7/130738666/pululit-girif.pdf
    • http://files.wellnesslifestylelounge.com/uploads/1/3/2/3/132302830/3467437.pdf
    • http://files.pathlightwisdom.com/uploads/1/3/1/4/131453252/janabexagelokan_zobiju_bazadedivaberap.pdf
    • http://files.thebaldiemovement.org/uploads/1/3/1/3/131398515/gunasunape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/organic_chemistry_10th_edition_carey.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/84552936795.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/sevejubekamogone.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/arithmetic_progression_and_geometric_progression_formula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/pokujuwawezotufixadebepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/country_code_593.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/23987883019.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/20571019108.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/85697040310.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/vosoxujutofezeruzeletof.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_off00007a6f.bin
e250ad010db06746eea5b4e846cd8e2d791aaa37bcfa0d3e2958dc01f2a4e00f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 5316 bytes
font_01_sfnt_off00008c59.bin
ef67b671934d2c0cbcf7decb7f71f23d8a5b59e209ebc85fa6fd49f7e663ed1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 10008 bytes
font_02_sfnt_off0000ae83.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE83 4324 bytes

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