Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9a7452255a07f3…

MALICIOUS

PDF

38.8 KB Created: 2020-08-21 05:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265e1ea600d0ba04fe25931c1f6b0cb0 SHA-1: 0eaef1feda564495368a45d49ba73ff9b3985dac SHA-256: 9f9a7452255a07f34b337d6f6fc36a2e75cbb036ec98ad7f3316be40142a6caf
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'https://ttraff.ru/pify?keyword=dim+as+sheet+vba+excel', suggesting a phishing or malware distribution attempt. The presence of numerous links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination.

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=dim+as+sheet+vba+excel
    • http://files.jpadventures.com/uploads/1/3/0/7/130775197/2067423.pdf
    • http://wubuti.8000robohawks.com/uploads/1/3/1/3/131383483/tewavu_ladamuvod_rowikibemepi.pdf
    • http://jetabeviz.leekindleforestry.com/uploads/1/3/1/4/131437508/7746912.pdf
    • http://vekisu.kmcartworks.com/uploads/1/3/1/4/131453870/pobunona.pdf
    • http://xutozixar.fourseasonsbuilders.biz/uploads/1/3/2/6/132696194/paduteturigupol_jexajinumojig.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/94231094730.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/40493761369.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/73955505575.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/38703890288.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/yayati_kadambari.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/57336552511.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/42924366711.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/43182274632.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/biology_for_ssc_cgl_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/73262335478.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/fagazorobaboxozuxulide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/wuwekupofenor.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_off00005ae5.bin
f5c7bcd09b5f4d1cb21ef5c167ce4a72ff9df1b9a8ccc40e4dbf57c3bc42eb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5208 bytes
font_01_sfnt_off00006c86.bin
8ba0b26fc111103a54ad0acd613389a9d8a304d5b301f964a10f27cee40f1d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 9908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.