Malicious PDF — malware analysis report

Static analysis result for SHA-256 257f5a3eba5d36f5…

MALICIOUS

PDF

68.9 KB Created: 2020-08-07 13:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da2360a675e2e10175f78e761184e0a SHA-1: bf3be49500e506f29b097acf5ac63c4b061162ff SHA-256: 257f5a3eba5d36f551a021324ed161d6a9f48b2078a8133b3e554231394cc5b5
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. This domain is used as a redirector to further malicious infrastructure. The document body, though heavily obfuscated, contains text related to a contract agreement, suggesting a social engineering lure to entice users to click the malicious link.

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=sample+of+contract+agreement+between+two+companies+pdf
    • http://tujafazu.dianajones.info/uploads/1/3/1/4/131483337/7a45a5b1ca4bc.pdf
    • http://files.friendsofappalachia.org/uploads/1/3/2/3/132303382/nuvit-litetoz.pdf
    • http://biwemado.en.fondationjeanninemanuelgala.org/uploads/1/3/0/9/130969723/dowadig.pdf
    • http://bapetola.tribeoffivehikeoregon.com/uploads/1/3/0/8/130874655/1b3810313fa4.pdf
    • http://files.abwooddecor.com/uploads/1/3/1/8/131871740/zuzepu-mitajoxixit-nenod-kimubadede.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/articles_definition_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/jemow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/zagagaseparepij.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/army_promotion_board_bio_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/tewevemodamujoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/schrodinger_s_cat_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/tewawix.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/calligraphy_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/25256249596.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/38034627011.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/wotofuzurif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/41880361665.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/26204396348.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_off0000c3df.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DF 2828 bytes
font_01_sfnt_off0000cdda.bin
21dd4695927c329515031aba16b2948a5b68393350d821c4c80785e5e8087908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDA 5812 bytes
font_02_sfnt_off0000e193.bin
ce716a4229e62425a7b0d778cbe0fcce1766aae06a5649b4742b36eab23c5cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 9792 bytes

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