Malicious PDF — malware analysis report

Static analysis result for SHA-256 8599e3e6f12d689e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 17:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 272b544e8105d4f3c4dd4bd2d6766838 SHA-1: c7c149b725d7a521841ed92a670c683a93a79e8b SHA-256: 8599e3e6f12d689e357f4a1594ac7ef1fb0f96e4d37d987ec03ce5834cfbaa63
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=analisi+logica+pdf'. The document body, though heavily obfuscated, contains text suggesting a 'logical analysis of a PDF' and references to wkhtmltopdf, indicating a potential lure. The presence of a link farm further supports the malicious intent of distributing content or redirecting users to malicious sites.

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=analisi+logica+pdf
    • http://files.theauctionofmanythings.com/uploads/1/3/0/7/130775734/meboguripe.pdf
    • http://files.bluecarpetcorridor.org/uploads/1/3/0/7/130739713/raduni.pdf
    • http://files.debistrong4peacehopelove.com/uploads/1/3/0/9/130968921/01f7e300c72.pdf
    • http://files.thedumplinglady.com/uploads/1/3/1/6/131607075/tixujumag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/tillich_systematic_theology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/wegopuzofefuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/86012914964.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/33009520807.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/crf50_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/tanedexorit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/dazuvimibejoronebifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/28978440265.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/vavubibus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/capacity_of_parties.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/48973072922.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_off00006621.bin
7d645bccb14d4d620f38e3b9bdb1a31616c087f5e782f390ef694c5e3254dfda
pdf-font-stream PDF embedded font (sfnt) at offset 0x6621 5216 bytes
font_01_sfnt_off000077f1.bin
f5f4f25953b5d6e0bb8c4d661e4f52a75c976a71109a5d387174a8d5350945c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F1 10956 bytes