Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2c617f6ef98c0d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 23:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 445b495dc2a59fc619bd40c0325511ad SHA-1: d67efe8aab71f08f3565caf09ef3d3c92283676a SHA-256: 0e2c617f6ef98c0d0b2225e912b3ba7a77da293d667ce0b6e9348408fe993671
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains embedded links that point to a redirector service and a large number of other PDFs, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The primary malicious link identified is 'https://ttraff.com/pify?keyword=blackduck+lake+fishing+report', which is likely used to direct users to further malicious content.

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=blackduck+lake+fishing+report
    • http://files.ellisonsherrillart.com/uploads/1/3/2/6/132682542/dutedetubaz.pdf
    • http://files.trinityfarmnwf.com/uploads/1/3/0/8/130874475/kubulimo-gejovajivafuxuv.pdf
    • http://vunumom.consecratedliving.com/uploads/1/3/1/4/131407241/3169694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/ford_555_backhoe_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/bevolorolimisakozodafe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/39653583922.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/zerebiwivorilulaxaxefad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/10856068189.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/mapipaxofadilipizuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/94972578200.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/cours_technique_d_analyse_biochimique.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/mubedis.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/kaizen_event_charter_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/lirilarojot.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_off00006713.bin
f5eab2ea4603c4be166f007db090165cc5c4702e2b06a51dcb13a1dae5e05405
pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 5528 bytes
font_01_sfnt_off000079ca.bin
ad19ccc4ab69a809e3a5ecdb103cd1a4ea3dc381fe62e7aa8a9d9d5fecc6be63
pdf-font-stream PDF embedded font (sfnt) at offset 0x79CA 10664 bytes