Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab4aec41a847999…

MALICIOUS

PDF

54.8 KB Created: 2020-08-07 05:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c78634d8f73844cc94e05099e936fd80 SHA-1: 702d8927b5c64d1db570c74338e054704ca3e481 SHA-256: aab4aec41a84799918ea11ea946b14896cd838cd5bbeba000f64ef99cdc30223
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=latex+beamer+include+pdf+slides'. The document body, though partially corrupted, also contains this URL and other links pointing to what appears to be a link farm hosted on Shopify. The primary intent seems to be directing users to malicious infrastructure through deceptive link text.

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=latex+beamer+include+pdf+slides
    • http://files.jogetcloud.com/uploads/1/3/2/8/132814415/kozef_zukefopupifo.pdf
    • http://files.troop167arlington-treasury.org/uploads/1/3/2/3/132302816/172313.pdf
    • http://zitavito.aftercareusa.studio/uploads/1/3/0/7/130775493/9425927.pdf
    • http://files.lion-biomass.co.uk/uploads/1/3/1/8/131856279/63d55863bf.pdf
    • http://files.alvinmarinellc.com/uploads/1/3/2/6/132696483/41f591dfed3.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/roginulorixep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/fedisosemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/90768867433.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/3086225455.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/54654751326.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3674/files/81950733403.pdf
    • https://cdn.shopify.com/s/files/1/0437/2804/4193/files/michal_phelps_smoking.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/21673181472.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/todaledazupawukisarovem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/fobubitaxidisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/44105346874.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/zisize.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_off000087c8.bin
82c00f933eb0d97011b3d0686ea871b9b500cb5d880bb0cf6fdbcfc077372438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C8 5220 bytes
font_01_sfnt_off0000996f.bin
1117819c6e423fb62fe9013eddc4a7a6fc8b34be0811fd9d5073ec38113d12cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996F 11312 bytes
font_02_sfnt_off0000c021.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC021 4324 bytes

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