Malicious PDF — malware analysis report

Static analysis result for SHA-256 8207c921efa8039e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-03 03:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6bad2ac267eeb0f8e6756b39d24b82 SHA-1: 867e5333ab2158ec675ed6731d82fec01fca14d5 SHA-256: 8207c921efa8039e1daac0ae3d4d29d0f3b28240533551b88195bd5d268bb5d9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain. This suggests a link farm or redirection scheme designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=nys+thruway+conditions', which is flagged as a malicious redirector. The presence of multiple PDF links and a malicious redirector indicates an attempt to distribute further malicious content or phishing pages.

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/pify?keyword=nys+thruway+conditions
    • http://files.whstheatre.com/uploads/1/3/2/6/132696512/d744f4df.pdf
    • http://files.carpetcleaningsantabarbaracounty.com/uploads/1/3/0/7/130775658/5ad34ce42d6795e.pdf
    • http://files.katesimpsondesigns.com/uploads/1/3/1/8/131857626/wiresavuxek_sagizuponovedob_ponifixopax.pdf
    • http://bomamim.laketenkiller.com/uploads/1/3/1/0/131070993/givovoxevipidu.pdf
    • http://files.drummondsmedlegal.com/uploads/1/3/1/0/131071209/9cf8efad25c11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/loxezunubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/90939592534.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/givogolad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3416/files/bowflex_xtl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/how_to_remove_bots_from_discord.pdf
    • https://cdn.shopify.com/s/files/1/0438/2385/7824/files/81370665213.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/22803888304.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/rca_universal_guide_plus_gemstar_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/wow_gloom_hollow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/94964051458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574f.bin
350100a24b85666116a8fde2473f4dd86715128254aac595eabecde9fbccfdad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574F 4924 bytes
font_01_sfnt_off00006805.bin
fe8739805dc5d324dc13329c1e2364f5b89a97b67b8235fe67cf1238a45c0bdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 13112 bytes
font_02_sfnt_off000090eb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EB 4324 bytes

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