Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2e2a752a805a04…

MALICIOUS

PDF

35.3 KB Created: 2020-08-06 10:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd29961ac14d06a9f6ae98e576a1589f SHA-1: 1820be561d08a126570b729bd96f1824fd4735ea SHA-256: fd2e2a752a805a0456c845e31f8af17e41c1c01f8aedf1b873aad2a37038e6bc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute further malware or lead to phishing pages. The document body, though obfuscated, contains text related to a legal manual and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous embedded links to external PDFs, many hosted on Shopify, indicates a link farm or SEO poisoning tactic to improve search engine visibility for malicious content.

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=manual+de+direito+penal+parte+geral+cezar+roberto+bitencourt+pdf
    • http://files.theventure.blog/uploads/1/3/1/6/131606923/2826909.pdf
    • http://files.befriends.org.uk/uploads/1/3/2/7/132710661/pisilunatasutur.pdf
    • http://bafukap.friendsofskihi.org/uploads/1/3/2/7/132740362/4643de316.pdf
    • http://files.ccplus10.org/uploads/1/3/1/6/131636725/876ce.pdf
    • http://files.apexvoterguide.org/uploads/1/3/1/4/131437306/pesutiridodumukokepi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/96256003498.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/susefijulejinubajires.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7051/files/54729041.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/71022356920.pdf
    • https://cdn.shopify.com/s/files/1/0432/9137/7828/files/tiwowazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/mysql_load_data_infile.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/rososetejopivuloxegep.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/rulirowesed.pdf
    • https://cdn.shopify.com/s/files/1/0437/4963/8295/files/31216866674.pdf
    • https://cdn.shopify.com/s/files/1/0434/6832/5029/files/44424758774.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/65498085273.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/83105977113.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/nesegirepivosutukoforiru.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_off000047e9.bin
7bb2de524c76ee5776aab0346db4767e3c315a446b7005c2694e78d8df517fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E9 5340 bytes
font_01_sfnt_off00005a38.bin
5540928551d4845872be879e927ad0854cd72cf5fef52e66978bbf5a36b05b64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 11788 bytes

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