Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3fb2b95b73f7a2…

MALICIOUS

PDF

38.4 KB Created: 2020-08-08 03:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e89b40786172f6a5157bbc20df01fe SHA-1: da9c84453b4463d420d4050be882b088f5f6c79b SHA-256: 6e3fb2b95b73f7a23dcfbff57cf60226ede11e2c138a0d784f8a832c21d88c75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious due to its inclusion of links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document also functions as a link farm, containing numerous links to other PDF files hosted on various domains, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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=daikin+air+cooled+chiller+catalogue+pdf
    • http://files.ourlordstemple.org/uploads/1/3/1/8/131856435/2018388.pdf
    • http://files.beabravo.shop/uploads/1/3/1/1/131163561/9035315.pdf
    • http://files.suncoastarchitect.com/uploads/1/3/1/4/131407802/dowuzawuweb-vowugodaxag-muwovugozanoke-damupuredaba.pdf
    • http://files.sandislandtennis.com/uploads/1/3/1/3/131398036/7488448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/fedatadoworana.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/rurudoboxoneguvi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/internet_addiction_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/arketipo_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/xiwusubifiresupamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/4284907294.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/xubufebamo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/consumer_behavior_leon_schiffman.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/8005/files/6172126524.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/86710787740.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000480c.bin
9d727951509239db7f9f329750591d3fefc68ef2f88516faf3213dd7aa5cf785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x480C 5304 bytes
font_01_sfnt_off00005a10.bin
b15b3fb603b76f56013c998b2e2545f84f0fe4a5dc09e8dd1b120f27cd60361c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A10 6688 bytes
font_02_sfnt_off00006bee.bin
244ce793f47792fc9546d9698c053d13623f24f01740a008b37f5e78bc6978e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 9396 bytes

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