Malicious PDF — malware analysis report

Static analysis result for SHA-256 3507478ff04a05b0…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 21:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1caaa0ce35f676f58874230863d3ee8 SHA-1: 25e1ab023914166e6ae20741036fab9afda3231b SHA-256: 3507478ff04a05b0a425e9183f5a8366edaebedce1bf5fea8fd618064829c5dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/wb?keyword=gartner%20application%20security%20testing%202018%20pdf, which likely serves as a gateway to further malicious content.

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.cc/wb?keyword=gartner%20application%20security%20testing%202018%20pdf
    • http://files.colfaxrock.com/uploads/1/3/0/8/130874180/fb1bea7a4d9e390.pdf
    • http://winekav.geographyburp.co.uk/uploads/1/3/1/4/131408027/jepazaluputawe.pdf
    • http://files.nashvillegtc.com/uploads/1/3/2/6/132695546/mefoper_riwasatugujap.pdf
    • http://files.depawdogsports.com/uploads/1/3/2/6/132681308/43864b3c31.pdf
    • http://siguzefe.awordtothewiseandcommonsense.net/uploads/1/3/0/7/130776257/guparikotarolew-wovebazoritax-jifuvixefekon-sawovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/wutuxumijofemiwaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/supolofitavefufazutibadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/47773001769.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/meziduseboresuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/sosogufafelamawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/british_and_american_accent.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/36382297411.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/tisewixa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/ditalafokaziwupako.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/discuss_barriers_of_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/41046807981.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/signos_y_sintomas_de_la_neumonia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006337.bin
60338666f0ccaaf940349316d023b8ff1250564f297935150aa16d9c862aec89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6337 5976 bytes
font_01_sfnt_off000077ac.bin
c5d48f01e8574cd30f6b4ad4500a77d0e458b4502f51e9f2544141b1e7dfb0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 10272 bytes

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