Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b12aa186c89379d…

MALICIOUS

PDF

81.3 KB Created: 2020-09-12 06:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bdf1b0a2d0b25cdbbe9dae43ac0b164 SHA-1: d6f8e854e8bfd982b42fc2e0c0c6dbada7b123e6 SHA-256: 0b12aa186c89379d16585d635fb019e8511df9ec6e7ef42ffdb5930bd73bd736
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for search engine traffic, specifically related to "fundamentals of engineering economics solutions pdf". The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=fundamentals+of+engineering+economics+solutions+pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/lenodezatezetobedijonid.pdf
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/baidu_er_script_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/kedamesozud.pdf
    • https://cdn.shopify.com/s/files/1/0459/8353/1175/files/45875465817.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/dalisogavida.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/83988876738.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/bob_dylan_knocking_on_heavens_door_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/resize_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/how_to_restore_your_chevrolet_pickup.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/medipejudagip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/tuwapematenosago.pdf
    • https://cdn.shopify.com/s/files/1/0463/0478/8637/files/ableton_live_10_with_crack_free.pdf
    • https://static.usrfiles.com/ugd/cc03df_27d953071be24315a3da48517690bc81.pdf
    • https://static.usrfiles.com/ugd/3283b0_592895b9bba1433684d78dd18e5da4c0.pdf
    • https://static.usrfiles.com/ugd/3bf302_b21f7585825f4f1d95d218099421a7be.pdf
    • https://static.usrfiles.com/ugd/ab922d_f0928aaac7e94e52b55330d7a8c35992.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b94e.bin
0172e917773b239235d24d9c0462b0dc2e040d9419e5f948fb092b7f031ee502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 1568 bytes
font_01_sfnt_off0000c122.bin
d63e14c18e3c89c0dbef77dc5afc0eec565baeb26a9be77518394b8dc0037907		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC122 5312 bytes
font_02_sfnt_off0000d30f.bin
3a53e2c392bb6015230526eb16c27ebe2a8506a528fda672519f9fc84bdf5467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 2408 bytes
font_03_sfnt_off0000dd18.bin
fbab77f910ef9e9fce46e0b7c2dbf65dcd97334d004ade762d09c59f231ba081		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 16560 bytes
font_04_sfnt_off00011132.bin
4fd39a652744dde8a99594ec88556329c99d05afd3935a70b7429b2f99486ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 16116 bytes
font_05_sfnt_off00012611.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12611 4324 bytes

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