Malicious PDF — malware analysis report

Static analysis result for SHA-256 8933ad0c3bb9e29f…

MALICIOUS

PDF

49.5 KB Created: 2020-07-27 07:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5a79524f46d0da4b76d2bc010d4ec6f SHA-1: b6e1dc8b9bb0ed781b840f27a7c50a1eca8fcfcd SHA-256: 8933ad0c3bb9e29fb4d673ea183d8851bc355a8af913032d87e752e84a334f2f
152 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one specifically identified as a malicious redirector pointing to a URL designed to lure users with a job-related keyword. The ML classifier strongly indicated maliciousness. The presence of multiple embedded URLs, including those hosted on potentially suspicious domains, further supports the malicious intent. The document body, though heavily obfuscated, contains text related to 'college student resume for internship template', aligning with the lure.

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=college+student+resume+for+internship+template
    • http://files.gemmiev.com/uploads/1/3/1/3/131380547/73f853a.pdf
    • http://files.theoregonripper.com/uploads/1/3/2/3/132302924/janavisefesub.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.wapgc.com/uploads/1/3/2/6/132682204/4679422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/simamoda.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/27798501499.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/dosor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/37194376350.pdf
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/tekutivovon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/51382579315.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/xopixexopadewibujejibu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/13886706155.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/77620296151.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000837b.bin
33222d982ca5dd7d8efe856f76fb2616a4fb985520361efbf5fdb439626bf11d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 5360 bytes
font_01_sfnt_off00009585.bin
24c62bc71d07aab0731a0e5236c45369d89994c95244243d183e24c4653ac51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9585 10240 bytes

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