Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cba2799211cf008…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 14:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0961103e408a1721a8d9e8ab5dbdfd SHA-1: 6b80f0926277c7fe5c76def3b6e7071a4e9a1d41 SHA-256: 4cba2799211cf0085055cbedc2407595b1071f0e875bf5674db599eec475774b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to 'Fintrac guidelines beneficial ownership' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=fintrac+guidelines+beneficial+ownership
    • http://foxuzibid.elysiumstylestaksim.com/uploads/1/3/2/8/132814930/f1cd4.pdf
    • http://files.thepostpartumhub.com/uploads/1/3/1/0/131070581/binugebudakurixugav.pdf
    • http://ratujep.mollysteinwald.com/uploads/1/3/1/4/131437423/jobebetovuguf.pdf
    • http://niloda.sar6inc.com/uploads/1/3/1/0/131070450/61c0c89a9467.pdf
    • http://files.yogaflowlivermore.com/uploads/1/3/1/4/131406222/fawur_keluko_zuduzakep_jibiporogokelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7579/files/juzetamapul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/47126467004.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/certificate_of_proficiency_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/57046031498.pdf
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/windwalker_monk_hidden_artifact_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/29045580209.pdf
    • https://cdn.shopify.com/s/files/1/0452/4467/8305/files/dedakojokuxawosoxoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/livro_biogeografia_e_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/wuzarupotopefaditetigogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/43971432738.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/code_geass_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/messenger_app_for_facebook_free.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_off000061cd.bin
e99e4429986c5bc0db6729e50e75cccddaa3b722775c979fe28b3f77ae77dd23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5604 bytes
font_01_sfnt_off000074da.bin
29662a9c4b6d63287b9b5d2ee0d2507eb2d9c4600647588131cf1256874fd9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 10260 bytes

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