Malicious PDF — malware analysis report

Static analysis result for SHA-256 595b6113fdfe43be…

MALICIOUS

PDF

59.5 KB Created: 2020-08-07 22:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da05195f8039434b12e85181d7fe2c7e SHA-1: 6e0599a68f2d6b04f0f60441f047b2d0ac1c4b52 SHA-256: 595b6113fdfe43beca5b1cebec59f03c0fac496ea6c7d3e06bbbfecc1b5f809a
152 Risk Score

Malware Insights

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

The PDF file contains numerous links to other PDF files hosted on Shopify, likely as part of an SEO link farm. One of these links, 'https://ttraff.com/pify?keyword=basic+tutorial+of+java+pdf', is identified as a known malicious redirector. The presence of this malicious link suggests the document is designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated.

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=basic+tutorial+of+java+pdf
    • http://zevenog.edmontondoula.org/uploads/1/3/1/1/131164100/1183837.pdf
    • http://files.adhdpasadena.com/uploads/1/3/1/4/131483147/d480e9c14.pdf
    • http://sepowo.ellawatkinsbusiness.com/uploads/1/3/1/3/131378780/gupovilupukawije.pdf
    • http://files.elovelidge.com/uploads/1/3/0/8/130814423/losopijowaxadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/mejajonatime.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/tinegave.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/atmospheric_science_an_introductory_survey_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/tofun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/81505698760.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/8978176758.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/47164532661.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/35477212842.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e58.bin
611f3db65d644b1c54ca9459fd1b922419f4f90529f892feeb7d4571f542e8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 6568 bytes
font_01_sfnt_off00007ea7.bin
eaefe9fa925a4eb196121dc303279b7ab6f66cd79776f2ac62502ba95ed7dae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA7 4992 bytes
font_02_sfnt_off00008fad.bin
f101fc3023143cbc24e87e2583c027b8b5ab7dfb9504abb66ff99af634bcdac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 1804 bytes
font_03_sfnt_off00009888.bin
8f08849e467386bccb7c764021ddc6c5d4ea9204fa0c4f9416d28387c781ee9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9888 10620 bytes
font_04_sfnt_off0000bcd9.bin
333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD9 16148 bytes
font_05_sfnt_off0000d1e9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E9 4324 bytes

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