Malicious PDF — malware analysis report

Static analysis result for SHA-256 77eb432cd6524578…

MALICIOUS

PDF

33.9 KB Created: 2020-08-02 23:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ddcbc88ac473aefb0862ff89057bb08 SHA-1: 9835a6676c3f36b2d34de31a9efe23820527b209 SHA-256: 77eb432cd6524578a50df5220fcf4a37ab22751c42a70cc89f5e05784a001f05
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bradford+pa+weather', suggesting a lure to a potentially malicious site. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy, likely to obscure the malicious destination or for SEO manipulation. No scripts were extracted, but the primary attack vector appears to be the malicious URL.

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.ru/pify?keyword=bradford+pa+weather
    • http://files.leveringmill.org/uploads/1/3/1/8/131871992/kanovimorab.pdf
    • http://files.senecaswissys.com/uploads/1/3/0/7/130738806/04abb.pdf
    • http://files.ddsbeautysupply.com/uploads/1/3/1/4/131453724/6202340.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5606/1850/files/45177523139.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/37300637331.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/82560657414.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/japji_sahib_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/97585065591.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7700/files/guxenixiwidatomopukodun.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/35497314021.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/92692702661.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/7241054822.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/level_50_candy_crush.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/19025816575.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004934.bin
aad2fd8a593f9ae9a41034b997ef499ce2e5255c5c4b9893157e30a82d486ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4934 5060 bytes
font_01_sfnt_off00005a7b.bin
eb80d91aa6f5a65ebc09d31d775eb4a7f6fa75ca02c8d47e9c4fd03efc79452b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7B 9492 bytes

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