Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe43894245da345d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 06:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 370445c01bc47617a11228c685159b43 SHA-1: e0f419d7003d97086bd86b270eccdfff5f52affa SHA-256: fe43894245da345d6eda3a6be8a05486851da48ff663488b2eb83442a7f58f1f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Joomla template framework' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=joomla+template+framework+by+joomshaper
    • http://files.promoteaboveworld.com/uploads/1/3/1/4/131408017/e9a2090ddf7080c.pdf
    • http://files.cacpalopinto.org/uploads/1/3/1/8/131871585/kujowu.pdf
    • http://tutawo.iwill.us/uploads/1/3/1/0/131071041/zozasofip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/agente_economico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/86524357145.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/99940394895.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/check_if_sudoku_is_valid_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/93106841830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/tinemoliwanuzizalumeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/denozogezegapogepoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/winapasonofekizofoxubal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000653d.bin
508db1516334a98240a4549d604fedef556d49ec8f132004144267c05591cdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 5236 bytes
font_01_sfnt_off0000772a.bin
1fe4df938edf9e673875a988cf0ff4668d747e7539e91db253c0c1f52e5d6584
pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 10568 bytes
font_02_sfnt_off00009b13.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B13 4324 bytes