Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59bf92010b2efa8…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 10:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce37250a9d61e3b6eaeb16f365d30e48 SHA-1: 5d335aa12171caf1118fc90cd88c7317ba5c2c46 SHA-256: a59bf92010b2efa8b8a2c1ba4b76458ac7549e95226eda2f37f8e87be0419871
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious infrastructure. The document body itself contains obfuscated content and a URL that appears to be part of the redirection chain. The presence of numerous external PDF links further indicates a link farm or SEO poisoning tactic.

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=alarm+check+valve+working+principle+pdf
    • http://files.focalpointproject.org/uploads/1/3/1/4/131484029/dudizatepog_bowuvolurun_pamunume_vinur.pdf
    • http://files.crowandcrown.ca/uploads/1/3/1/4/131438098/galegajavi-giduxolosaben-ruxizutogozat.pdf
    • http://files.spiritualcollectiveproject.com/uploads/1/3/2/7/132740405/adb7945bc266.pdf
    • http://files.lesliecarpenterholtphotographer.com/uploads/1/3/1/6/131637308/wurafe-resamupuvivij-tolimidefepupoz-menajijav.pdf
    • http://files.aayfitnessandyogabyjamie-dee.com/uploads/1/3/1/3/131398605/3447536.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/25314465777.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/zobigebiguf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/68643452689.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/belowisimexoxowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/67474715509.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/feveru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7977/8979/files/36210583607.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/36516789172.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/nimukiguwogivev.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/motitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/sepexawamugojixegigazepaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/99667957064.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/
    • https://cdn.shopify.com/s/files/1/0438/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4e.bin
e02b74ee7c0070c8c5953cfb4a9377197ccc09a983e0795813e40a3d6a6099cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 5596 bytes
font_01_sfnt_off00008048.bin
c9a6a222ee8913118815625f73bebe4a5b143f8daaaaebd8350424805843ce97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10008 bytes

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