Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb627c06af561b5…

MALICIOUS

PDF

44.0 KB Created: 2020-07-29 08:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 255d8c6a66c535cc62b6729af4fe3857 SHA-1: 2f89b1a4cb8a8bf42874b2d28663eef83aae494e SHA-256: edb627c06af561b55a027b39f9f70c412e51bc669679c97c472b391dbefb26ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Jeevan pramaan patra form', suggesting a lure for Indian users. The primary malicious IOC is the redirector URL.

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=jeevan+pramaan+patra+form
    • http://files.diversifiedhst.com/uploads/1/3/1/0/131070051/dorepibuso.pdf
    • http://files.rune-path.com/uploads/1/3/0/9/130969989/zutatorivobaf-mowimuvaja-piloted.pdf
    • http://files.netcabinet.ru/uploads/1/3/1/0/131070195/rizerupotipax_pusufagutaboti.pdf
    • http://files.walthamchangemaker.org/uploads/1/3/1/6/131606965/jimel-sokagapofove-xaxamej.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/dubib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/52566715778.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/gojugugepunutowejep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/71063119636.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3326/files/44180159506.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/juvetotafenusabag.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/dezugawuwatuzalug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/rujibomafite.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/49879661480.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/78774269529.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_off00007104.bin
fe79c0558eaa0b15de00bed9432b22256d6206c884a7f4197eb093722882f3bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 4624 bytes
font_01_sfnt_off0000809e.bin
01c412dc10ea5643f265a29886b6a98c6f8e6475c0d4772dda69047a1db6b06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809E 9964 bytes

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