Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e66f6441d9c6f3…

MALICIOUS

PDF

51.8 KB Created: 2020-08-12 09:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0cc371d0cda4c5ebc9471af3dde3f41 SHA-1: b113dbed3e2444e2f004d7915db2444801411e03 SHA-256: 80e66f6441d9c6f33099f4e62d9a1dcd03c1697fb86dfbd01f01fe95097e1bf8
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains links to known malicious redirectors. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.com/pify?keyword=absolute+advantage+and+comparative+advantage+pdf. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links suggests a redirection-based attack.

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=absolute+advantage+and+comparative+advantage+pdf
    • http://deledexe.wonderfulpowerfulme.com/uploads/1/3/1/3/131379246/roketox_jegitiri_kuditanokakowof.pdf
    • http://xobibobo.vortexengineer.com/uploads/1/3/0/8/130874631/wekines.pdf
    • http://files.sangcofair.com/uploads/1/3/0/8/130874594/9239989.pdf
    • http://files.christianjzanetich.com/uploads/1/3/2/6/132683070/9004350.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/77820528450.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/jizarawesijadubenukiguja.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/dsignation_des_alliages_d_aluminium.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/58814663282.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/pirates_of_the_caribbean_easy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/63385844113.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/roserava.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/xisozetonivo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/algorithm_design_manual_skiena.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/66089019644.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_off00008c44.bin
32afd45d1462e9418d8ad56122f2ce180f56a48ccd2fdf9b9af1297a7dbc01c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C44 5664 bytes
font_01_sfnt_off00009f6d.bin
cf63e16e133aa9bddc37ba2cd95f1e532f82f7769466e048923426ebdc4f2ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6D 10040 bytes

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