Malicious PDF — malware analysis report

Static analysis result for SHA-256 545f63dee723df0c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 09:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 092a7816c214d4d1cea371396c78be84 SHA-1: 1227e47f102a5b91ffe06784439e92518c58a995 SHA-256: 545f63dee723df0c3e494d9dfd2154fa96e138a275d5214319b415ad223af268
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=hiv+aids+information+in+english+pdf'. Another critical heuristic identified a PDF link farm, indicating a tactic to distribute malicious content or SEO spam. The document body, though partially corrupted, contains keywords related to 'HIV aids information' and the malicious URL, suggesting a lure to a deceptive website.

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=hiv+aids+information+in+english+pdf
    • http://files.mothers-for-mothers.com/uploads/1/3/2/7/132712011/vubunujaduj.pdf
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdf
    • http://files.harrisondomain.org/uploads/1/3/1/4/131408172/2013890.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/vebolimera.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/35396397850.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/uniformly_accelerated_motion_vertical_dimension_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/norma_tecnica_de_anemia_2020_minsa_peru.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/tumimezuwovaful.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/rojorobadazisemama.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/vaxago.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/formatar_s3_mini.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/honda_fit_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/vizodotikirojatupedig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/7712956357.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/82413543284.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/94793785863.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_off000062f5.bin
cf5fb2b8b35b6f78339f90fb5ff7d19040de84002fb5234380054ff23db8bbdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 5476 bytes
font_01_sfnt_off0000756c.bin
ad5a56137a0e4960e3bf11c3f49172f1897a03ef48e22fe1c473d01603135e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 9944 bytes

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