Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6de0e538de45942…

MALICIOUS

PDF

41.4 KB Created: 2020-08-17 14:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d476ebe6348b6ce4c8ccdca842dbc20 SHA-1: e75520f66daf5fee0bd5794a8576a6ed918f58ee SHA-256: e6de0e538de45942b28aba986dee9f5b224bcff6f474decac89c6c830f2d100f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text related to academic templates and also includes the malicious URL. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to increase visibility of the malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=ieee+pes+transactions+template
    • http://xexuzoma.suzanneandrewsfunctionalfitness.com/uploads/1/3/2/8/132814930/seziso.pdf
    • http://zejadubus.wholeheal.co.uk/uploads/1/3/0/8/130874540/resigabetiwapuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/anti_trafficking_law_in_myanmar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/kalnirnay_calendar_aug_2019_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/28372560.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/6740025983.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/tanorezosibaberejaseza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/nidagikelilur.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/81066531344.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/biological_science_freeman_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/76189793095.pdf
    • https://cdn.shopify.com/s/files/1/0439/2330/8712/files/57841450365.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/bojomidifufosepodale.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/51057407461.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/23921935082.pdf
    • https://cdn.shopify.com/s/files/1/0450/3319/3622/files/59720970792.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_off000063f9.bin
24f2ae8cc66533d1307f66b9233cedf051f8059fa3d9a8418cf789cde182fed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 5016 bytes
font_01_sfnt_off000074e3.bin
08a75b5b3e60b50c5a2102ba1dfb62e2436aea89873a7007559772849150e4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E3 10500 bytes

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