Malicious PDF — malware analysis report

Static analysis result for SHA-256 1951a2dfa2ef7810…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 06:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f42e68e64fcaa40731c9f2faa7b8901 SHA-1: f0ae43369b8ccfd16208b0eff65cc54e38aee5fc SHA-256: 1951a2dfa2ef78103895c35595039e065260491083de38dbcaf7d7909ae670d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial stage for a malicious payload delivery. The document body, though heavily obfuscated, contains the same redirector URL and references to PDF files, reinforcing the link farm and redirection attack pattern.

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.cc/pify?keyword=surah+yaseen+with+urdu+and+english+translation+pdf
    • http://files.tammylynnhenderson.com/uploads/1/3/0/7/130739826/1369365.pdf
    • http://files.illustrioustees.com/uploads/1/3/1/3/131398406/812050f7718.pdf
    • http://majumeme.savajrsvolleyball.com/uploads/1/3/0/9/130969060/1715516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0646/6976/files/zaronikomeduxoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/38719635333.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/62909744402.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/79897383545.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/6664089205.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/kofowolexod.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/arabic_ocr_to_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/33613263607.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/pufizavemokow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/mathrubhumi_calendar_april_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/labururujezadegef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/mavunireju.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_off00006280.bin
da2a09936592a4bf8472ce9b75fa93d85db1673cf82a63272a18d2ba44a93b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 5600 bytes
font_01_sfnt_off000075a3.bin
f2897131a3f358e6a53a5babd1f84c28ff45e233ae8e6acf91b169648d48ea4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A3 10036 bytes
font_02_sfnt_off0000981a.bin
29a3787f47b05283ae8c29c40afbb15b1f9530e2c2d66964e8d1b990b71cd5b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981A 16852 bytes

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