Malicious PDF — malware analysis report

Static analysis result for SHA-256 6007d6d7cf44a479…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 15:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c70c4a8829a19a7d664fb010ccc50155 SHA-1: 958c05374cfc27413efb53352fd414d27a330665 SHA-256: 6007d6d7cf44a4796fad70f81a6c22c597a8ffe4093b41ef77b18f15ffd0a5b7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic indicating it's a malicious redirector link, pointing to a URL designed to lure users with keywords like 'winrar archive free'. The document body also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or download lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic further supports the conclusion that the document is intended to trick users into downloading a password-protected archive, likely to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=winrar+archive%2528.+rar+free
    • http://sanavemex.heatitupandkeepitcool.org/uploads/1/3/1/4/131438114/8819823.pdf
    • http://files.floridabestblueberries.com/uploads/1/3/1/4/131437680/3115684.pdf
    • http://files.mindfullifefocuscommunity.com/uploads/1/3/0/9/130969709/koxamenukorote.pdf
    • http://files.policeaward.com/uploads/1/3/0/8/130814118/lebege_wopanilo_pomas.pdf
    • http://tutikibi.sitcon.sk/uploads/1/3/0/7/130775997/xuxafeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/78943403421.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/saruw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/2916008018.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/kibemupus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/82816270219.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/dragon_ball_z_cell_saga_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7742/6584/files/33641193297.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/midule.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/bibaxafejubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/wapuzezukidabanutoliz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e2.bin
1cb84a0a1aee33648e99ca13cd8d64b6a90b6f368f2b66c1d641d6489ad8cec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E2 4944 bytes
font_01_sfnt_off000074c6.bin
80ad7714b0480ae8a28232c3a929306551f779127c979ed20d609ddbeae7917d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C6 10384 bytes

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