Malicious PDF — malware analysis report

Static analysis result for SHA-256 475e6d8daf77729b…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 16:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2605399cc41c7219da7d11d6efddb919 SHA-1: ba35379c82aa0cfd2590b981a33cbe0a00c7ec43 SHA-256: 475e6d8daf77729b120d7f049c907f7235b4a3d1a397050419cf0cafeb055f98
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a redirector, both disguised as a "Clash of Clans hack game app". The primary malicious URL, https://ttraff.cc/pify?keyword=clash+of+clans+hack+game++app, is a known malicious redirector. The document body, though partially corrupted, contains keywords related to the lure. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of malicious links.

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=clash+of+clans+hack+game++app
    • http://jutabet.westboroughboosters.com/uploads/1/3/1/3/131383377/15b527c.pdf
    • http://files.jewelryandwatch.shop/uploads/1/3/2/3/132302833/8818348.pdf
    • http://lufigola.gerardvanzeele.com/uploads/1/3/1/4/131410685/6724326.pdf
    • http://files.emmalisterart.com/uploads/1/3/0/7/130740522/6947727.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/62435313907.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/48337140037.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/employment_news_24_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/fipima.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/xikupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/janamumogitigutidulujefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/introductory_geographic_information_systems.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2375/files/techniques_d_amlioration_continue_en_production.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/ragilumawijofawusolifil.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/fefepixuvavaduwaxijilujo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2298/1032/files/54100366350.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/chemistry_atoms_focused_approach.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006222.bin
42b6dd947fa7b9068004719e2ab49fb4f633b298c0044fc4f1d7e0fddf10e712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 5080 bytes
font_01_sfnt_off00007331.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 1800 bytes
font_02_sfnt_off00007bbf.bin
24f1d71663d3eae93b735974a29b90464a67ceae17f463f04013c6ee6b326b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 10684 bytes
font_03_sfnt_off00009f43.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 4324 bytes

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