Malicious PDF — malware analysis report

Static analysis result for SHA-256 36cbbb678b7301ca…

MALICIOUS

PDF

55.0 KB Created: 2020-08-06 04:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a79ad44eaa28553dc18c07da9953cfb SHA-1: 0425a2adc0a2fda27468c0ed5532cc384f5c98d2 SHA-256: 36cbbb678b7301ca15fb2f2ea545cf008e08ddb3efaab12f818477828acdc549
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, likely for SEO manipulation or link farming. Crucially, one embedded link directs to 'ttraff.com', a known malicious redirector. The ML classifier strongly indicated maliciousness, supporting the presence of malicious infrastructure.

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=canonical+form+of+pde+pdf
    • http://files.therawcliffeschools.co.uk/uploads/1/3/1/4/131483584/lokidevekasegozik.pdf
    • http://files.discoverybayyachtharbor.com/uploads/1/3/1/3/131380029/xupimapuxawokazogef.pdf
    • http://files.junewygant.com/uploads/1/3/1/1/131164129/geluvaza-susavojose-ronopasa-lelasozamiwafob.pdf
    • http://files.intimationsdance.org/uploads/1/3/0/8/130874566/nuwido-vifizanamor-jevapim.pdf
    • http://files.kerncanineactivities.com/uploads/1/3/1/3/131382239/fifubiratujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/agenda_docente_2020_chile.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/51588323752.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/koneti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/xamogimogakegonopijixemox.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/mekafamab.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4738/files/basilusosezabaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/95977345543.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/sipubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/xedadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/fox_sports_m3u8.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/zosagafowetafopitupezar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9148/5091/files/16566240554.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_off0000757b.bin
6831c41a07f4a91b33ed9949ce447c89782b261ae739c772742b1acf48f7dd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 5028 bytes
font_01_sfnt_off0000867d.bin
4b4970bdfaa79939e19a85609e1fc6cf9e67d562d961092e75fb672825d30cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867D 15540 bytes
font_02_sfnt_off0000b741.bin
510a1fc2ac82a87b226d4b04f09f7d4f7294c6880eea9e7e6a2edba93645c8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB741 16224 bytes

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