Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e48ce2d8b713761…

MALICIOUS

PDF

51.3 KB Created: 2020-08-14 19:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed9fff1573577bee0629f8b44b0f5487 SHA-1: b39cf122f84a04377721f88fed73afd782cd7d4b SHA-256: 6e48ce2d8b713761bfeb2cb9bcefc5c850252578d9fe0142024ce23bc905af7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=hey+baby+mp4+video+songs+free'. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to trick users into clicking through to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=hey+baby+mp4+video+songs+free
    • http://files.alyxjacobsdesign.com/uploads/1/3/1/6/131606368/rukarudonuki.pdf
    • http://files.moruyaanglican.org/uploads/1/3/1/4/131438111/dulerokozi-xamujuwed-pepijaxemad-bipusopam.pdf
    • http://files.edward-stroh.org/uploads/1/3/1/0/131070500/fusoxugoxumapogo.pdf
    • http://files.lkradio.online/uploads/1/3/0/8/130813756/a5f488e3a30347.pdf
    • http://files.glasgowag.org/uploads/1/3/0/7/130738799/kibamujufuzagisata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/zokemazazubebipibuf.pdf
    • https://cdn.shopify.com/s/files/1/0443/4313/2316/files/ancient_history_notes_for_ssc_cgl.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5751/files/98364985700.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/tujuan_anamnesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8231/6957/files/greek_myths_stories.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/piero_calamandrei_derecho_procesal_civil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/vidakeminesiberuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/1820/7911/files/principles_of_macroeconomics_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/svtp_wifi_hotspot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/aiag_spc_manual_4th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d2.bin
4560d83f67380c6bbd2e425726f39257d47ff909c4f89ccacc1abd42c6732a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D2 5680 bytes
font_01_sfnt_off00007c21.bin
f6411d6f7f354ceabf6e580dae1a0ee4b2c2db9c2705ecb36baba7e4e09268cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 10492 bytes
font_02_sfnt_off0000a068.bin
eeb4be94b15270c3995f606f8c29c38f168d7bdff3ab642b1489a4648daab926		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA068 18908 bytes

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