Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c35194f1636580…

MALICIOUS

PDF

52.9 KB Created: 2020-08-10 14:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f030f4804dd30076af2d9fbbdbbfa21f SHA-1: 5e63e1f3c455b528e53857af2668d4f1e4b870b6 SHA-256: 68c35194f163658021c3a53822e406ba67474dea5d16a57d9260ea01314b3dff
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to suspicious domains and are likely part of a link farm designed to improve SEO for malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=chemistry+book+class+11+cbse+pdf', suggesting a lure related to educational materials to entice clicks.

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=chemistry+book+class+11+cbse+pdf
    • http://fokeg.rachaelhudes.com/uploads/1/3/1/4/131407406/3773259.pdf
    • http://valolopi.yourownfm.com/uploads/1/3/1/4/131407995/5e5bc47d408f84b.pdf
    • http://files.mymodernsolutions.ca/uploads/1/3/2/6/132681362/runadutalitepij.pdf
    • http://jexemukas.piercecountyscd.org/uploads/1/3/0/8/130874493/2637653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/loser_like_me_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/62933458739.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0428/3029/9292/files/jiguwuxiduw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/janapaxemaginelapejavivot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/xosufaketasamamenujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/transformers_armada_ep_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/82747683207.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/86040371526.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/99972288385.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/dutimatojaparazetup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006227.bin
4b7ef6ec4691ee6cc415954040e62f5cec1008210516e7893b65e3db4bdb3ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 5656 bytes
font_01_sfnt_off00007539.bin
d30ffe2a909744a5749e2f9c522e302e3c05dac389194459ab66b5bd135a92e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 6964 bytes
font_02_sfnt_off0000890c.bin
ddc519834ac11a80ea52b27702c4f15e981d7b24ed2f81bf3aaa5b2c9f45c4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 10360 bytes
font_03_sfnt_off0000acbd.bin
b2b92fcd2919487c650493c91add21b847ed7c13e64e38272e25808cac974a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACBD 17492 bytes

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