Malicious PDF — malware analysis report

Static analysis result for SHA-256 337b3131710a5614…

MALICIOUS

PDF

54.1 KB Created: 2020-08-19 14:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eedfbb14924d40a2c18f11c6d746a3f9 SHA-1: 2e4968344cce8f77c18a622ae073175fb4a5f667 SHA-256: 337b3131710a5614c55505081be2e6a3b762fc3de9ab63441f367406b33b648d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to 'ttraff.com', which is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly supports the malicious verdict.

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=significado+de+movimiento+rectilineo+uniforme+acelerado
    • http://kudex.alllittlerockstars.com/uploads/1/3/0/8/130814288/ebd8dd505b69f48.pdf
    • http://kogudaka.paintedponytattoo.com/uploads/1/3/1/4/131406665/1340132.pdf
    • http://files.thebearstfriendsfurevershow.com/uploads/1/3/1/6/131606253/vurewewujipuwit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/78683268513.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7351/files/zelda_ocarina_of_time_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/zesolasirikenud.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/physics_4th_edition_walker.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/63293991606.pdf
    • https://cdn.shopify.com/s/files/1/0441/4049/5000/files/95969757189.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/rekuwaduvujivozowelowuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/windows_xp_telephone_activation_keygen.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d26.bin
d6deaf419b1bd91d853e5eaa82ba65438cdbdb6990ca3361fa86830c893c3f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 5208 bytes
font_01_sfnt_off00006e7d.bin
f8984e9593ee9d461129857dbabf8292e4beb15fcc2cb9ac194b5b91453b4d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 6460 bytes
font_02_sfnt_off00007e49.bin
e2e56e4bcc551303ba652dea6d587d55680224924417acea5314199552d88eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 13308 bytes
font_03_sfnt_off0000a7a3.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A3 16060 bytes
font_04_sfnt_off0000bc36.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC36 4324 bytes

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