Malicious PDF — malware analysis report

Static analysis result for SHA-256 684a6eb18062c2b7…

MALICIOUS

PDF

33.4 KB Created: 2020-09-08 12:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2c28a54449970d416cbe04d79215024 SHA-1: bdd9317d6bc07e228c1ad17dd98e3d4c05aa83c3 SHA-256: 684a6eb18062c2b7aa222297e9173fcd022e127e66a2ee7a029a1ab18f8ef0b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at 'https://ttraff.com/wix?keyword=crying+meme+template'. The document body, though heavily obfuscated, contains this URL and references a 'crying meme template', suggesting a social engineering lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely to lead users to further compromised content.

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/wix?keyword=crying+meme+template In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e140007085bc436899dd611ba47cae93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/906e9f_6ffd0dad63c14545b9af86818e72be64.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ac1ab_3a15c16107924744a8833f1449640938.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/136d07_73115870bedb48ff822c76e99f147704.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/64f9d2_4bed5d50f6704a8290e7a7b346af6b37.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/jasez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/vevalugir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/296484_2fb09139b3044993b86b1fe033bd27a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aee12_cc6a3a53e1864b00af870a5f1f1fd35a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99a8f2_750d285db9e84a84bf09ec16119c56f3.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4539 4968 bytes
SHA-256: c087173229d6e2a343bb89a13100c52ad504b12afaaed8e1ce16ebc160923659
font_01_sfnt_off00005610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5610 10392 bytes
SHA-256: 53c4c652b622a5297ce3f09e4c323e065480e974b7f7e4843f3a66605a50745d

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