Malicious PDF — malware analysis report

Static analysis result for SHA-256 b669ee2c7029e461…

MALICIOUS

PDF

85.3 KB Created: 2020-08-04 11:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c59525806852be834250f3f858ec473 SHA-1: eda4cd6d7143fafdd868fcba7d9d549b8583879c SHA-256: b669ee2c7029e461d12551263c6e1342da9cb955006e3d66ad68f60f7488c6f5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=ways+of+the+world+third+edition+chapter+4+pdf'. This URL is embedded within the document body, suggesting a phishing or social engineering attempt to direct users to malicious infrastructure. The presence of numerous other external PDF links further supports a link farm or SEO poisoning tactic. 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.ru/pify?keyword=ways+of+the+world+third+edition+chapter+4+pdf
    • http://files.hamptoncommunitykinder.org.au/uploads/1/3/1/6/131637056/8391510.pdf
    • http://files.terroir.vip/uploads/1/3/1/8/131871856/dinilafiwezobi_busuboberoxek.pdf
    • http://files.txgrandma.com/uploads/1/3/1/3/131398143/rarivakeb-potimib-sekatelute.pdf
    • http://files.2ndgencamaroparts.com/uploads/1/3/0/9/130969430/886a7a9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/jegite.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/58475676272.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/mitavijuxodorunigup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/litapexejusododaxixini.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/oxford_picture_dictionary_english_spanish_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/gawonobevakixetodiwuxar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/15922979757.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/mefevoxigefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/vurewurez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/49001153860.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/ascii_art_sunglasses.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/zajojeforevepoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/pilobasemutudawo.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_off0001022a.bin
2a95bfaf43406212a3c627d29aac0a0c3a2764dffddf2bbd07a4f9a440cc1081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 5328 bytes
font_01_sfnt_off00011459.bin
7c968eb4aae60cea7707e39c1d2ed053a98c93c7036fb5c4c5d6a84712500f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11459 10724 bytes
font_02_sfnt_off000138b9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B9 4324 bytes

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