Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fcd1e2ec2ef49f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 14:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2be012b9032e9256eeda81874f2c3554 SHA-1: 31d31c209a11fff85fb35ef6cd1dc8b0fb6d6835 SHA-256: 53fcd1e2ec2ef49f0e5fa7eb9deb58eb2d2afeee892adfc94b5f781079d96e25
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a business management document. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to the URL https://ttraff.com/pify?keyword=business+management+ib+oxford+pdf. The document also features a link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. No scripts were extracted from this sample.

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=business+management+ib+oxford+pdf
    • http://files.thomas-irvine.com/uploads/1/3/0/8/130815095/wolatufekaxe.pdf
    • http://files.sdwoundedwarriortennis.com/uploads/1/3/0/9/130969476/tunakafes-dinonolukefasi.pdf
    • http://files.myadminonthego.com/uploads/1/3/0/8/130874148/wusozokanivuj-vidoboziriso-wopanu-borobov.pdf
    • http://files.keziahweir.com/uploads/1/3/1/4/131409037/pixam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/10430785519.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/archinteriors_31.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/51674023470.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/gagogozasetogifuvaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/xixozemoxukizerodezulimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/vetiduzanemegagevunigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/durisazekuzuzoviwit.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/xexukikupekasuxekovoxogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4971/3817/files/farepuwafufewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6806/3895/files/vutirudutavofipawasof.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/pedibegudobule.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/43653470816.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/41081109333.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_off000060ec.bin
f19a3bf7867d9cbb209341b535340e803106fbfb9cf2e4306cd5a052f4555876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 5588 bytes
font_01_sfnt_off000073d9.bin
5339d99d39de287e9a1ad3fd300cbe8010e1d53b667d8440d55f5be5a439d0cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 10112 bytes

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