Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fce614e7339773…

MALICIOUS

PDF

47.2 KB Created: 2020-09-03 00:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7bb132a478e72ff3ba8e0b87afb044a SHA-1: c004272ac58402b5d617cfb19e9fced64ef43fbf SHA-256: 18fce614e73397734a0b042f01d2a6ec22e7fe510a1b844bf4699226e8325cbe
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though partially garbled, suggests a lure related to installation guides, and the presence of a 'download' button heuristic further supports a malicious intent. The primary malicious URL identified is https://ttraff.me/wix?keyword=arch+xfce+install+guide, which is likely used to redirect users to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=arch+xfce+install+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/041b56_9a74b757800841ac822746b0d72333e2.pdf
    • https://static.usrfiles.com/ugd/6a7407_951b1207dd5149afabb55faf04e46e21.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7348c0ba49440286388a7f8114c242.pdf
    • https://static.usrfiles.com/ugd/409ca8_16cc191a2e5c48b8b4a9930d0b5c154e.pdf
    • https://static.usrfiles.com/ugd/05900a_710b68f33f9f442eb067edcaca1e2b8c.pdf
    • https://static.usrfiles.com/ugd/c3f88d_87757e42bf864f65b900344e00820eb7.pdf
    • https://static.usrfiles.com/ugd/ab922d_3c57819d912d487eba8dad4d6e61c8d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4090fcf43e6a42b4878bfa469eef41a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2cef5258e2f4b43b3ac8039376843e3.pdf
    • https://static.usrfiles.com/ugd/efc97f_3fc5516ac81b433fb185198354d9ed3d.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/simple_english_grammar_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/hp_officejet_pro_8600_driver_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/52692579366.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/20374281021.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gekonilafuzajejuxikefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1348/8292/files/sifelezajira.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/67402645229.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/49702425385.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b3d.bin
5da44f9a6abfd3b271256f6e171d69a90f1f20a0caaa14766f872d4fd270a277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 5340 bytes
font_01_sfnt_off00008d65.bin
dd973bc931572493ac2df8db50b168ff37d3048e0ee8f511ff1c2063d5e32436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 10084 bytes

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