Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a7ca51bd123a3c…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 21:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 89eaaeeeb67b2014a2cade4dd0160294 SHA-1: bbc33090dcfc6f5135954b3311bb44bc2004ed43 SHA-256: 57a7ca51bd123a3c1e0cf05372215475be308fb4063def7611fe595a3588f426
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'rockabye song', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/pify?keyword=rockabye+song++in+320kbps In PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6319/6310/files/gisodomuboxiwogiveli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/accounting_meaning_and_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/56692192827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7791/8880/files/beamer_presentation_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2437/5195/files/employee_conflict_resolution_agreeme.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/917232_666c8397d89c4c30a992804d491ad808.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/33a16d_bce656dea7114837880ec478b8d30154.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_95797f8b807143c5af5fd41e7d5949e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f6a24_798f26482ec64c43ad230de76003370e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/rowebufupex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/gungeon_coin_crown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2629/files/meu_nina_travessa_lyrics_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/komage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/root_canal_filling_material.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5ed537_1a4425fac33347d6bf9148e8097d0c52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_052d99a1c8654a9eaa0a961d2708cee3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f2646_c8f0c75cfa064584a3a4113a8c6f16e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d9f7b5_6f4ea78ea12347689a1e5a7cb619a1f5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4814 3036 bytes
SHA-256: 4a661a9c739d25c9e381b5e21335915b0d80147d062edbb44b0b0e91c68028ea
font_01_sfnt_off00005526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5526 5724 bytes
SHA-256: 4531664f9fa5d9e71f4671193783e68ca313390e63be39335d101f82ac1c1c9e
font_02_sfnt_off000068c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 2000 bytes
SHA-256: 0ab821ee24cf1ef520e7a5024c2d02a3941efe36b6e71de6fcb744fd3ea134d8
font_03_sfnt_off00007231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 10104 bytes
SHA-256: c727fd1540e3b0be14e5ccafbcfc31540971d1d2a3fa9572dd6ccc8fe462f755

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