Malicious PDF — malware analysis report

Static analysis result for SHA-256 697439323b05736d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 15:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335ddb8df6304981106a679315628ec1 SHA-1: a12d6a52193d2af1a7baea06e4bb94a4d9fbdf3e SHA-256: 697439323b05736d7e60ced72d90bcceb8c5d694fd4b9e7c6c9661ddbe27f7be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to a 'vaccination card'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content or for SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=cartilla%20nacional%20de%20vacunacion%20mexico%20pdf
    • http://fudawi.portcitygymnastics.net/uploads/1/3/1/4/131406893/dugomenapezudifelede.pdf
    • http://mamap.acestudio.be/uploads/1/3/1/3/131379730/rusajuxabegatazepo.pdf
    • http://files.popgalleryorlando.com/uploads/1/3/1/4/131453006/d2e1e0b9ff6d1fb.pdf
    • http://files.southernhighlandsphysie.com/uploads/1/3/0/7/130775241/7f270c28be3.pdf
    • http://moxenokaz.icaess.com/uploads/1/3/1/4/131452903/9d3d17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/jopunifogekokibilo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/73146623413.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/nelegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/62722654664.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/lamamulozirelutovedalixu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/32856982151.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/99599267615.pdf
    • https://cdn.shopify.com/s/files/1/0428/8954/3836/files/bameterixapasadezezid.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/22974939111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/34141588367.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/wigebudaporikip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/24103035508.pdf
    • https://cdn.shopify.com/s/files/1/0430/1360/3491/files/zalegina.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_off00006251.bin
eb880036adb8b69e1ace624c1f2f6dca6628baa7e977c1039b604bd4ad211c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5156 bytes
font_01_sfnt_off000073cf.bin
a7695a2532551a7c6f2fff93c8013588ee002b4dd4d633caa209384f2109df9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 11140 bytes

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