Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c6463cd1892395…

MALICIOUS

PDF

64.6 KB Created: 2020-08-07 20:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2721f6eca5ea3015aa6e6d587d3ed5 SHA-1: 7af7e84bbf7e6b77a214d5dcd72b5c09046df319 SHA-256: 63c6463cd189239599775c1203e0d8119cab60af521db437ec941f2595fcd229
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=kakad+aarti+in+telugu+pdf', suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic, likely to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=kakad+aarti+in+telugu+pdf
    • http://files.mtnspinweave.org/uploads/1/3/1/4/131453592/e68978dbfb6d4.pdf
    • http://files.shepherdsfortress.org/uploads/1/3/0/7/130775997/4cfa41a37.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/calories_in_different_foods.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2655/files/nesirobugololakovise.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/cheap_booklet_printing.pdf
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/likejudunexa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/baofeng_uv_5r_manual_greek.pdf
    • https://cdn.shopify.com/s/files/1/0454/8227/9062/files/colossenses_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/18901576598.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/rafarutekaxigufuxerunit.pdf
    • https://cdn.shopify.com/s/files/1/0438/4292/8790/files/58549231537.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/un_livre_pour_apprendre_le_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/gofevos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/kagomalesul.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/pedovesaxupapowonuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/how_to_read_stock_market_charts.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009093.bin
4406626741f7a4d23c6b3a1f7d9129c031a644a2d9567b459935e846e4be08a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 4836 bytes
font_01_sfnt_off0000a10c.bin
2d7f465c50885347db4cdce66df902fc5fc7f4b98d78cf61694bfbaaf0fcdc66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA10C 15772 bytes
font_02_sfnt_off0000d1fd.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD 16132 bytes
font_03_sfnt_off0000e6f4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 4324 bytes

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