Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbba3af15b810b9…

MALICIOUS

PDF

33.5 KB Created: 2020-08-13 22:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d15692719e8fe147cae3f04516d53bb SHA-1: 861b65fe288121235ec227fbbf5595fa4e51c53d SHA-256: ddbba3af15b810b94f6d6107dd7b81d3b87b97b1b54a64b22e83a9724dfd8894
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains text and URLs that appear to be part of a link farm designed to lure users to malicious infrastructure, specifically the URL https://ttraff.ru/pify?keyword=bonetrousle+remix+free. No scripts were extracted, but the presence of multiple links to potentially compromised or malicious domains suggests a phishing or redirection attack.

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=bonetrousle+remix+free
    • http://files.thisorthatkids.com/uploads/1/3/0/8/130874633/d117eff4f37.pdf
    • http://lijuniv.hyndman-honhon.com/uploads/1/3/0/8/130874058/petijunevirojizukus.pdf
    • http://files.settingsfalmouth.com/uploads/1/3/1/3/131384573/3398cb8bed06194.pdf
    • http://files.ehechtennis.com/uploads/1/3/1/3/131383586/8504646.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/sefagizupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/kwikset_powerbolt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/tazekitodewuvub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/perfect_ed_sheeran_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/accounting_and_finance_for_bankers_macmillan_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/highway_capacity_manual_2016_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/rajiwanube.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/rirozowepebavemefazunedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/44769724458.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/73423286016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/lauren_simpson.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_off000047fb.bin
6befd355d25d2d59bce00e13dc1323cb3aa457d81173bfa8847d5e55372ff519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47FB 4820 bytes
font_01_sfnt_off00005851.bin
da7fe8ef828432994181f13f499ecf7ab97e68e753c045b4c475800edce85c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 9656 bytes

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