Malicious PDF — malware analysis report

Static analysis result for SHA-256 db14617d1f5f5263…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 01:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284a0753d687c88c27fd9daf33f9959a SHA-1: 7e3ef5802ac1ee3be5b4aac63047ec143c1bdf43 SHA-256: db14617d1f5f52632d9ca5ae4dbbc581638c9e623d8783c4322eb69b982eb6a4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text referencing an 'Apple watch series 4 size guide' and the malicious URL. This suggests a phishing lure designed to trick users into clicking the link, which then redirects to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=apple+watch+series+4+size+guide
    • http://files.organizedhaven.com/uploads/1/3/1/8/131856860/kubila_zatadomewivuz.pdf
    • http://xuled.comprehensivewellnesssolutions.com/uploads/1/3/1/4/131413418/rovivatipazi-botugisuda-pijuput-lipajojudowu.pdf
    • http://files.cejcontractoraccountants.com/uploads/1/3/2/6/132695582/vapom_balidadu_tawojujili_numivadekejorot.pdf
    • http://files.lifebeginswithyou.com/uploads/1/3/0/7/130775076/rolapunanek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/fadujaruxudegimovowise.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/96835940609.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/free_kalimba_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/ben_ten_omniverse_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/spagos_beaver_creek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/85657003303.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/kijezegirelamujuxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/happy_birthday_lisa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/22371201122.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb0.bin
7376d3b4dbcc78400742143c93d05a8dd9c4a2018e1d9051da8fe518ad236da9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5220 bytes
font_01_sfnt_off0000709c.bin
921ebf7a000eba9f6e020363b7c52c9fb2aba1021d686b190bc4c0a445079b24
pdf-font-stream PDF embedded font (sfnt) at offset 0x709C 10352 bytes
font_02_sfnt_off00009408.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9408 4324 bytes