Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b4b6a5cb975e6e…

MALICIOUS

PDF

50.2 KB Created: 2020-08-21 11:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccc74c0ad724cc2c138aca998d380ac9 SHA-1: 12563ddec2e43f04eda5ec427c93c8d4b76cdb11 SHA-256: d7b4b6a5cb975e6ece2e501dbcbcd73a0571d18cc7aacfda90c7e119303ab9ae
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of external PDF links, suggesting a link farm or a method to distribute further malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=drools+rule+templates.

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=drools+rule+templates
    • http://nuxumuvir.babyg-lash.com/uploads/1/3/0/7/130775583/1617803.pdf
    • http://wakixewa.montaukmist.com/uploads/1/3/0/7/130775173/ef9977384.pdf
    • http://tufagaji.trailsidecountrystore.com/uploads/1/3/2/7/132740328/6154205.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/10462149958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/jdsu_hst-_3000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/66577031249.pdf
    • https://cdn.shopify.com/s/files/1/0434/9136/0934/files/rejoxilufile.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/34505296485.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/lafopulipusewuladuwowi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3029/files/16_degrees_43_minutes_north.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/72989814719.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/healthy_ketosis_and_intermittent_fasting_book_dr_berg.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_off0000876c.bin
8582c29fc95a24e7be8613e8ac079ded024b337abed5c38077c4df4831247ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 4964 bytes
font_01_sfnt_off00009834.bin
52aa6bf73e81d6cd241be19d18e79fb0ac81028c34d71c64247f1466eb3564f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 10804 bytes