Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a127c8cfa46673f…

MALICIOUS

PDF

47.0 KB Created: 2020-08-10 04:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ccf85eb44ebf872fd124a544a3cbcc SHA-1: af28d4dc0d0a4c519f7ad26755a53c94a3d93db4 SHA-256: 2a127c8cfa46673fc621d6fbc9c3d809708c9c2a8e954ea9d9dd007c3e930963
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'Certificado de origen mexico colombia pdf' and the malicious URL, suggesting a lure to trick users into downloading or accessing further malicious content. The ML classifier also strongly indicated maliciousness.

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=certificado+de+origen+mexico+colombia+pdf
    • http://xoxubof.lionsdiabetesawareness.org/uploads/1/3/1/8/131871674/4b5ce.pdf
    • http://files.green-hopefoundation.com/uploads/1/3/0/7/130739457/dajokevaxamomaze.pdf
    • http://files.jjeffreymesserole.com/uploads/1/3/1/3/131384018/f3faf9c41e.pdf
    • http://files.rueckkehrzentrenschliessen.org/uploads/1/3/0/7/130739393/wesiguxan-saxanopirupox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/ropamataraxuxevifi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/zapapupuwilexomer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/binumuxuxipuxovuxoxakino.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/star_wars_battlefront_2_prima_official_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/fejajogitazesodopumaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/78393222246.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/reruvevusejadarane.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/asturias_isaac_albeniz_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/2650306329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/counter_strike_source_config.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/29375809005.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_off000074ff.bin
cc40f0aee620cca9bc24fedb040a35e544731a70401bc66f46b6d943a19323f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 5412 bytes
font_01_sfnt_off00008751.bin
f68c8b0d677e1619a7147629c49cf76d7b8e06f7c30a1061e97faf18b17c4f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8751 11564 bytes

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