Malicious PDF — malware analysis report

Static analysis result for SHA-256 030a27cdf942e07c…

MALICIOUS

PDF

67.5 KB Created: 2020-08-07 03:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72f973b27a81478a6eef147501a3d10b SHA-1: 69e30eb86bd8c29f0c3446339f6dff1150890559 SHA-256: 030a27cdf942e07c557436f753c82fd955f820aa5dae33fb0bd28b6be9793e13
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body also contains numerous links to external PDFs, suggesting a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly indicated maliciousness.

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=skewness+and+kurtosis+examples+pdf
    • http://files.sideofsweat.com/uploads/1/3/0/7/130776619/555d01.pdf
    • http://files.mohawks.net/uploads/1/3/1/8/131857304/fowimekulurodu-wafatipidamu.pdf
    • http://files.lewesglass.com/uploads/1/3/0/8/130874240/07fec11b.pdf
    • http://meboxizi.nicolejonesalabama.com/uploads/1/3/1/8/131856161/dutebukisavikis.pdf
    • http://files.oringandseals.com/uploads/1/3/0/7/130776562/dofelemebuzokek-junuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/air_vessel_in_reciprocating_pump.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/xejanulilurirav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/gixukin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2037/files/bideresofufavawirot.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/48906915305.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/diduvaxuja.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/pulorojewedusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/kogubanubivixofonomigetuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/fuziwomivusimexekiwavoded.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/xanodiwabokovabusepabuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/mp4_player_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/10_hp_tecumseh_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/15813584150.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/media_query_breakpoints.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b818.bin
a3e2d95185345586eeb8983b8badda132469d433ee621835ea223b6c372ed65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB818 5512 bytes
font_01_sfnt_off0000cadb.bin
0fd3f7a884113684b2aa971391dd7bad18cc181ca90ef68c492dce05b7c2b43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 16640 bytes

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