Malicious PDF — malware analysis report

Static analysis result for SHA-256 0132460b9040046e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 12:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c70d5af1e007a8f12cc05abae6e98f7 SHA-1: 9ccef66685d2a3a834cc867438bcfb1cb4792736 SHA-256: 0132460b9040046e419b7d8610043c86a1be3fdd60827662d13f4f4194f7b8e6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to `ttraff.cc`, a known malicious redirector. This suggests the document is designed to obscure the true malicious destination by using a link farm and a redirector, likely to bypass security controls and lure users to a malicious site. The presence of a password archive lure heuristic further indicates an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=very+hungry+caterpillar+worksheet
    • http://files.birminghammedalsociety.com/uploads/1/3/0/7/130775848/lopijaxifusew.pdf
    • http://files.ajsherwood.com/uploads/1/3/1/4/131414561/6306648.pdf
    • http://mefopara.rickironsrarecoins.com/uploads/1/3/2/8/132816202/2123326.pdf
    • http://files.ghayco.com/uploads/1/3/0/7/130775679/1b1ec256.pdf
    • http://gilaf.kellerdesignbuild.com/uploads/1/3/0/7/130775904/9fe96895f2a28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/global_times_reporter_hong_kong_airport.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/27914735338.pdf
    • https://cdn.shopify.com/s/files/1/0447/9349/5709/files/yesterday_beatles_classical_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/lilim_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/gardenline_41cc_petrol_chainsaw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/vibojevilata.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/basic_technical_mathematics_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/pearson_hall_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/34002577928.pdf
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/18963001065.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/shia_islamic_books_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/fowinerewesuvesufol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/kedoroxibavimokudelipij.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_off0000658f.bin
ba9cef127fcc79a45096c5da278b6f47b6fcbee66ae9798054c55f7ab7896e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 5416 bytes
font_01_sfnt_off00007810.bin
85058a04949b4d8c43db77fb1768d428cdd96d1fe55a961cc577911be886a47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7810 10580 bytes

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