Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd551c9f245ccc32…

MALICIOUS

PDF

51.2 KB Created: 2020-09-06 20:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3049127f81e6252d559aa482f6aa9a63 SHA-1: f67af4689651200a0e44bf0dda8b15f1276b7f92 SHA-256: bd551c9f245ccc32ce4ed6b5d2706043dd15d4bfca64c048493e13f92eaac8f2
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/pify?keyword=brain+dead+movie+2007', which is likely intended to lure the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted from this sample.

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.me/pify?keyword=brain+dead+movie+2007
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/jupukulepewirik.pdf
    • https://cdn.shopify.com/s/files/1/0461/6480/3747/files/scrying_sheets_tcgplayer.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/nonallergic_rhinitis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/the_toyota_way.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/34377449022.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/wolujijowategoze.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/abigeato_significado.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/991_es_plus_calculator_tricks.pdf
    • https://static.usrfiles.com/ugd/49be48_e39ee9b7553a49ebb0cb3402184cc6f2.pdf
    • https://static.usrfiles.com/ugd/362633_0db99baa7b66436e9394bd5889cb5bb7.pdf
    • https://static.usrfiles.com/ugd/d6b5da_deda553ee22f467a8094c3e3c5829c58.pdf
    • https://static.usrfiles.com/ugd/269bb8_4d05bc3d163c4690957376cc5a1e67a9.pdf
    • https://static.usrfiles.com/ugd/f91cf1_d03558864512424385b994a8baf9d642.pdf
    • https://static.usrfiles.com/ugd/912de2_422c2b8276344d699247f0b80c20a567.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_6a20baf61c7744ca8604c3b09473592b.pdf
    • https://static.usrfiles.com/ugd/87b9a8_de703d0e869b4d73b210c237acbc0b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/921909_5a5d8b56f8924eb187a70c03a3ce05b1.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_off0000635f.bin
c728abf37b2adf8aebbd45ec986208b9d389638e7c840baa61953f40435d9850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 6452 bytes
font_01_sfnt_off00007361.bin
f4e33b17523cbbef8074f1f56fea77fa94665095de6c9570a03739f753d8753e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 5224 bytes
font_02_sfnt_off0000851a.bin
3550b0093cdef67ccf071b4abbf0a3ef3c3adc800688d575d022c6ede9c3795a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851A 10688 bytes
font_03_sfnt_off0000a982.bin
a100a590bab19bd81c3dc79a97c695b759e2ff478a51b19351cc8c4c0f40c341		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA982 16188 bytes

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