Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9e2224a8804a5a…

MALICIOUS

PDF

50.4 KB Created: 2020-08-02 21:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d57430d88d12e20f8881b88714caf4e SHA-1: 4ec7b08733c05130295fe7aa8313b5347f8f36d7 SHA-256: 0a9e2224a8804a5a52bd9d0cdb9e1392cf7aba414807e5d6d6071d8976f9ca0f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'free change order template pdf' and numerous embedded URLs, many pointing to Shopify and other file-hosting services, suggesting a link farm designed to distribute malicious content. The primary IOC is the redirector URL, which likely serves as the initial point of contact for further malicious activity.

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.ru/pify?keyword=free+change+order+template+pdf
    • http://files.himburgelectronics.com/uploads/1/3/1/3/131378991/9038526.pdf
    • http://files.tctexasbaseball.com/uploads/1/3/1/3/131383541/tixul.pdf
    • http://files.kentuckianaelderlawadvocates.com/uploads/1/3/1/4/131452826/dizitaguwapos-dimuz-sifilokexiw.pdf
    • http://files.cphcoffee.com/uploads/1/3/1/4/131454012/8254082.pdf
    • http://files.mrsmarcelleschoolofdance.net/uploads/1/3/1/0/131070336/6750567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/numobotetadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/redugugonadavivumuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/50299688887.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/98382434077.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/50627394606.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/midobowofulifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/morax.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/baixar_filme_possuida_3_dublado.pdf
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/73515999713.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/14219615893.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/25427840130.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/6282342496.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/vezanerofaw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008717.bin
0d638d90b8be59474a30e5d68f19166ebaf63ec1352ddd0e05962a93df70138d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8717 5348 bytes
font_01_sfnt_off00009922.bin
ec0c6a4d51b47e4e05eb9e45f89a965e5ec3ba94ed17578d0459f29fcf1df5e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 10212 bytes

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