Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf298d932ec1cc02…

MALICIOUS

PDF

48.2 KB Created: 2020-08-03 00:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3300d8c9e12a0e50efc2f576494e53f9 SHA-1: 73587d610c38edcf23fdf7cb845c32977e0ed11b SHA-256: bf298d932ec1cc02d1c40a404484b20b6c45de1ba7f916a361c197b8e9213b24
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, including a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=mythology+by+edith+hamilton`. This suggests the primary purpose is to lure users to potentially harmful websites.

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/pify?keyword=mythology+by+edith+hamilton
    • http://files.feat1stfilms.com/uploads/1/3/0/7/130775997/694716.pdf
    • http://files.buckmotorsports.com/uploads/1/3/1/1/131164488/3362656.pdf
    • http://files.wicollaborative.org/uploads/1/3/0/7/130775916/9922083.pdf
    • http://jexadewiw.carpetcleaninginedinburgh.co.uk/uploads/1/3/0/8/130873951/bobav.pdf
    • http://files.dawsonelementary.org/uploads/1/3/1/4/131437812/2005607.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/12575443161.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/wimudavidonisalav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/suvutetapedudelulubome.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/david_gray_sail_away.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/99108625470.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/zevam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/32932150170.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/xagosokibixanazumiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/suzuki_motorcycle_repair_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/napisogimusigat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5722/5638/files/442-_256-_8015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/print_address_labels_from_excel.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/proform_treadmill_parts.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_off00006aeb.bin
85666b99606f04e52c56d55ef97c198dbff7ac84faa0fb77dc441fa500dfc44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEB 5212 bytes
font_01_sfnt_off00007c8c.bin
2d4a02105b625024ff9d4126acc605e1ffe76bc7d171ff7e8e58ee39eb2e5eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 7148 bytes
font_02_sfnt_off00008fee.bin
cd392666543fe6ef382ea0cb8a575231d345c824c49365b481e220425404ed63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 10272 bytes

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