Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dda7d63678588d3…

MALICIOUS

PDF

36.7 KB Created: 2020-08-07 08:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89d7da8c16ea6203bb2d62c99cd796d5 SHA-1: 0a88e3f90ead78f24e66e1183a09bb37f9345bea SHA-256: 6dda7d63678588d382b4909d54c1f2d4692988d7d506c0509b017053888ca7e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and a URL that appears to be part of the link farm. This suggests the primary purpose is to lure users to external sites, potentially for further exploitation or phishing.

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=breath+of+the+wild+explorer+s+guide+pdf
    • http://files.brianneminaudoteaching.com/uploads/1/3/1/3/131381539/8b6e1.pdf
    • http://files.sarahjenness.com/uploads/1/3/1/3/131383478/4fc0d813b26c51.pdf
    • http://files.hikingnewfoundland.com/uploads/1/3/2/6/132695244/gulax.pdf
    • http://files.bhmsdrama.com/uploads/1/3/1/8/131856277/tatuji.pdf
    • http://mitalogi.zihouhealingarts.com.au/uploads/1/3/0/8/130873995/5216ebe6b776e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/sujajeroguvoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/tisemoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/baxijis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/fowetagekorabelamava.pdf
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/80362190399.pdf
    • https://cdn.shopify.com/s/files/1/0434/8166/1600/files/55785987080.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/308970076.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/tavokamumekubikezepunolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/74772149500.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/donanofazolejejuxekuke.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/mozubedakid.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/69775464125.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/vofigivibimekirafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/effusion_of_gases.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/pdf_converter_computer_software.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_off00004e9a.bin
5562230704dc787c159f134ee1ea81bb7f989e5ee8a6a5fb257627b21a19ec51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9A 5512 bytes
font_01_sfnt_off0000616e.bin
4fa36620673bce999ce5c78230d71f9f9ff006805fedf7fe66627133832d8590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 10040 bytes

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