Malicious PDF — malware analysis report

Static analysis result for SHA-256 9876e7a90646f6cb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 07:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2221bdca71667d3ce1ae0400df78701 SHA-1: 172a5d60ee45b27656c94c6bf8b14260ef4c42d9 SHA-256: 9876e7a90646f6cbfad30b78a0c8b2d2b6f7eb8da0a3d61d3d6b19da42bccfdc
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body text, though heavily obfuscated, contains keywords related to movie downloads and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The PDF also exhibits characteristics of a link farm, with many external links pointing to various PDF files, likely to manipulate search engine results.

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/wix?keyword=main+tera+hero+movie+download+openload
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/mujuxizamuvepatusepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/fusionner_plusieurs_en_un_seul_avec_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/sel_dan_organel_sel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/bonazudixikelijotole.pdf
    • https://static.usrfiles.com/ugd/9d869b_d02801d0a5e74dbc96e0a11044c682ef.pdf
    • https://static.usrfiles.com/ugd/16a96a_575490ab0bc345639950f7b38c57a667.pdf
    • https://static.usrfiles.com/ugd/4ae4db_58620220231c49fcaecd6601ad617b3c.pdf
    • https://static.usrfiles.com/ugd/4725f1_235b7add4daf40bcaf285348e2452ded.pdf
    • https://static.usrfiles.com/ugd/f967ac_334eb6c0b5454d52a216886a92964a53.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c91929b26ac4a369e61d35d2d485e70.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96d25c4cc5c480582757f9d36e12178.pdf
    • https://static.usrfiles.com/ugd/865d50_65d7b5e82e0540e99721aed59daabead.pdf
    • https://static.usrfiles.com/ugd/b8c837_309a309bfe6143808f7624433e6b85f0.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/17393692489.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/68665266694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niriliruvurufuwupaku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/27337969007.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_off00004cb1.bin
f80d42c7218a08b1c921846dd9a27de376e21cf16e80d5469f19909d534153cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB1 5176 bytes
font_01_sfnt_off00005e38.bin
7757d2d424147a7293c27d53ff01955d941c6afa7e4c499df2d8caa1ae5c45e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 9860 bytes
font_02_sfnt_off00008023.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 16164 bytes

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