Malicious PDF — malware analysis report

Static analysis result for SHA-256 4011a491ea1ac27c…

MALICIOUS

PDF

50.5 KB Created: 2020-08-10 17:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ede32cadc60ab193d04c496e4bb28d SHA-1: 42ee57141d7b0432ab06e091c2da7713c5938ce9 SHA-256: 4011a491ea1ac27c268517fc6766051f4752671e376e784bf51c2a16c0849a20
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=absolute+and+relative+bioavailability+pdf'. This indicates a phishing or scam attempt, likely to direct users to malicious content. The document body, though heavily obfuscated, contains the same URL and references to "absolute and relative bioavailability pdf", reinforcing the lure. The presence of multiple PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=absolute+and+relative+bioavailability+pdf
    • http://files.authorrebeccaarogers.com/uploads/1/3/1/6/131637034/wakobobo_jujorufaxeso_puxul.pdf
    • http://files.seishinkan-iaido.com/uploads/1/3/1/8/131871593/2daeab.pdf
    • http://jimenifib.andilockemears.com/uploads/1/3/2/8/132814930/lilezosos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/5e_order_domain.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/79142516730.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/90087548309.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/13755310778.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/zilobolovaxijam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/45663278850.pdf
    • https://cdn.shopify.com/s/files/1/0449/5550/0712/files/92734292983.pdf
    • https://cdn.shopify.com/s/files/1/0436/7443/5737/files/deadlock_in_operating_system_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/20767176053.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/kifubarijixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007982.bin
5db7ec97a81675ee00483dc6cb1f9c37dc323982befa05aeae3f39498ffb9879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7982 5208 bytes
font_01_sfnt_off00008b42.bin
389b0d9f47b5db4f3a59c646d9733a846ee60c2b083fd9d843cf32a658707fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B42 10520 bytes
font_02_sfnt_off0000aec3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC3 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.