Malicious PDF — malware analysis report

Static analysis result for SHA-256 2458744734fd5e86…

MALICIOUS

PDF

47.1 KB Created: 2020-08-02 01:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab16d968711aaf6f4756a094502b1b3 SHA-1: 2e4915dd393c07e92c532be77abf43789121e65e SHA-256: 2458744734fd5e861aa2c87a083c36f301768289a4643612d38dff9235522145
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains this URL and appears to be a lure for a driver download. The PDF also hosts a large number of links to other PDFs on Shopify domains, likely for SEO manipulation to improve the ranking 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.ru/pify?keyword=bluetooth+peripheral+device+driver
    • http://files.copelandconnection.org/uploads/1/3/1/8/131856574/2643010.pdf
    • http://files.kalinabg.com/uploads/1/3/0/7/130776682/0499461ad5e29.pdf
    • http://files.ocmulgeeblacksmithsguild.org/uploads/1/3/0/7/130739835/lotolemotovazikij.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/zixexifof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/kiwama.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/garevatuvazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/vazurapifapoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3390/9665/files/bopugavunusagosor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/21091374884.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/19178379672.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/xanodezopelagutujozuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/komokanaxudikeleseton.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/16873474370.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/59828361140.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/xoxuxotuji.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/brooks_was_here.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/jewamumawunixudodafoxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7e.bin
a03c767e587a3221579f9ba6a58c4aea488735ed320c221d47a409928f7a9f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 4868 bytes
font_01_sfnt_off00007f24.bin
6aa81cf3dcab5f34dbbc3806949f46251f363439f25355382358ea2c5e52ae87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F24 9968 bytes
font_02_sfnt_off0000a150.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA150 4324 bytes

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