Malicious PDF — malware analysis report

Static analysis result for SHA-256 051912f777ff5d2f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 08:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af5709df2216d075e39a5a522b247f05 SHA-1: 0a6a11e94e55e74d643e3539e34dcddfd6420b2e SHA-256: 051912f777ff5d2f78da4d2cf7e06a3dce35d571b7abc93c2f05167efbdb5c56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'lookups in google sheets' and the URL 'https://ttraff.com/pify?keyword=lookups+in+google+sheets', suggesting a lure to trick users into clicking malicious links. The presence of numerous PDF links, many hosted on Shopify, further supports the link farm hypothesis.

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=lookups+in+google+sheets
    • http://files.woodsinbloom.com/uploads/1/3/0/7/130739712/zetuj.pdf
    • http://files.cancersurvivalwhatsnext.com/uploads/1/3/1/4/131482953/lenit.pdf
    • http://files.newarkrotaryclub.org/uploads/1/3/2/6/132681342/lalosaxuzexaw_sogesomid_sazukifi.pdf
    • http://japegotik.theworkersclub.com.au/uploads/1/3/0/8/130814328/dc8f95.pdf
    • http://files.woodbridgelimo.org/uploads/1/3/0/9/130969966/5934810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/nujotojimufebotepine.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/9883259672.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/the_magician_s_land_epub.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/kavojekadub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/xobagotawixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/dnd_3._5_phb.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/toshiba_projector_television.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/54370202961.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/93124450010.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5573/files/how_to_show_dividend_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/46615107152.pdf
    • https://cdn.shopify.com/s/files/1/0453/2862/9915/files/java_annotation_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/xuzuzebaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/bachir_gemayel_songs_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a49.bin
6e30286cdbccf87b043c846951cfa78407ec8a446e6c0af01d51ae2c4fa9bef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A49 4780 bytes
font_01_sfnt_off00007a95.bin
ab48321e60953906941e6f05dc2ffccdd3deb2e1d06d88d5f65b6c98f038f45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A95 9956 bytes

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