Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2d3bba62303401…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 11:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e270082fdb96d0882876239d3880fa SHA-1: a644d07a41f3a0493a4b7c36115ff871e7412c79 SHA-256: ec2d3bba6230340154a8184ee5c829d1825eb5b55722e7fce8448e022dec0412
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body itself contains garbled text but includes the target URL and several other PDF links, suggesting a content-scam or phishing lure.

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=treatment+of+heart+failure+pdf
    • http://vimune.jonathanrudy.com/uploads/1/3/0/8/130874254/liwatojazatesop-wuwib-kudowosi.pdf
    • http://files.thebird-dogs.com/uploads/1/3/0/7/130775734/4096958.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • http://files.rickiwood.com/uploads/1/3/1/3/131382330/6ca4d7.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/soxovafuriperituxowidibod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/bernoulli_s_theorem_demonstration_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/19373551040.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/82669200170.pdf
    • https://cdn.shopify.com/s/files/1/0433/1480/6937/files/daxupifasuvotuvavaxixadov.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/itunes_for_linux_mint.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/kc_star_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/rapport_de_stage_rapprochement_bancaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/geledisefisipaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/pay_my_metro_pcs_bill.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/45087733582.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/how_to_blow_up_tnt_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/getelodoladabogenowobepun.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_off00006f7b.bin
ec519c5a9abad77cacfa7e498bb2471ecc2e9322d0333f9cc0c4d5c483fb93ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7B 5052 bytes
font_01_sfnt_off0000807a.bin
3eecc8b3d59f36b60839db8e0200e0e3b8fffe14b926fc87aa29921fee007c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 10456 bytes

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