Malicious PDF — malware analysis report

Static analysis result for SHA-256 b848109647f79033…

MALICIOUS

PDF

36.3 KB Created: 2020-08-22 00:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf587f695ea0361f8ebc0f8a25dc6e39 SHA-1: 7c63ec5380be9b396bc76e8afbaaa38f1a9c769a SHA-256: b848109647f7903345ff981fba3c3f11d29efeea87aa5fb9fbc34997605aee22
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=bytecode+information+technologies', is flagged as a malicious redirector. This suggests the document's purpose is to lure users into clicking through these links, potentially leading to phishing sites or malware downloads. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bytecode+information+technologies
    • http://files.pilotmissionarybaptistchurch.org/uploads/1/3/1/3/131381614/3924811.pdf
    • http://jetiz.advancedbenefitscorp.com/uploads/1/3/1/3/131380600/puvowelat.pdf
    • http://files.villa-daniela-brela.com/uploads/1/3/1/3/131380845/8755471.pdf
    • http://fexejixax.maldonarchive.com/uploads/1/3/1/3/131382486/2644ab28.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/38_latin_stories_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/kemeverugapofetal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/pototetoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/rs3_firemaking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/podujumerav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/tulaguzidadigira.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/66110288385.pdf
    • https://cdn.shopify.com/s/files/1/0449/2463/3243/files/how_to_make_minecraft_shield.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/water_aerobics_certification.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/nafelemozavejav.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/fasewez.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_off000043ba.bin
71eed1935db9081be56e2710d6b23465e9f49964d3c4e9dd579ce12f394e1707
pdf-font-stream PDF embedded font (sfnt) at offset 0x43BA 5372 bytes
font_01_sfnt_off000055ce.bin
08d890803c12dab306b123f4d2ba057c2317c67b225752f0c90a683a8779b834
pdf-font-stream PDF embedded font (sfnt) at offset 0x55CE 9492 bytes
font_02_sfnt_off0000762a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 4324 bytes