Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd9a190e32265b9…

MALICIOUS

PDF

46.0 KB Created: 2020-08-05 23:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4da05f13e7068171be6c654ddd6dcd SHA-1: 0a2e782fec23d55c5bb9963ef132e939ac559b9d SHA-256: 9bd9a190e32265b991dec0eba4c2ae01e61ac77db36e4af7c298afeb3879b8ae
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to improving self-confidence and includes the malicious URL, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify domains, likely used to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be a deceptive link.

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=comment+am%25C3%25A9liorer+sa+confiance+en+soi+pdf
    • http://files.sussner.info/uploads/1/3/1/0/131071253/59ebbf0003.pdf
    • http://files.victorjoelortiz.com/uploads/1/3/1/6/131607063/340346.pdf
    • http://files.villasant-angelo.com/uploads/1/3/0/7/130775633/minebikededivov.pdf
    • http://files.barrongafford.org/uploads/1/3/0/8/130814208/vibiravojimisid_lukonij.pdf
    • http://files.absolutelyfabulousfashion.com/uploads/1/3/1/4/131438464/kivedo-vugalaxa-sazuvorafij-boguwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/79208133386.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/22606032483.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/30528963140.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/28669396322.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/remove_blank_page_from_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/fabunaxujejipagenowiwed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/20614328754.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/10141231564.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/76488449870.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/91988516814.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/git_push_new_repo_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/xedin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/wefazevomonof.pdf
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/mezifibofobugaloku.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_off000062c9.bin
346483ac117ca5639fb4dd55628bb3ffa4cc17a3763d25abe2d088706bce9d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5256 bytes
font_01_sfnt_off00007441.bin
41b9185590f8c0b886a806aa196a51f55ec3f7d85c364cb54304b4b1104619e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 12180 bytes
font_02_sfnt_off000099eb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99EB 4324 bytes

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