Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7ed4177e2710ba…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 01:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f27955b6cd407688b6ec2ce0173c4fb9 SHA-1: 4cbd7d8d9264bb14fe1321aedfea40dd19b413e7 SHA-256: 3e7ed4177e2710ba948a553cbff159fe7912e996caaa98bc34aa9f786465dc45
152 Risk Score

Malware Insights

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

The PDF document contains a lure referencing a movie title and embeds a large number of external links. One of these links, 'https://ttraff.cc/pify?keyword=creature+2011+full+movie', is identified as a malicious redirector. The presence of numerous links, including to a malicious redirector, suggests an attempt to direct users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=creature+2011+full+movie
    • http://files.harrylrios.com/uploads/1/3/1/3/131381078/nidejoku-munegaderiz.pdf
    • http://vuvur.missingpersonsrv.com/uploads/1/3/2/3/132303354/598715.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/30719520581.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4713/files/catholic_confirmation_invitation_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/94854679917.pdf
    • https://cdn.shopify.com/s/files/1/0430/9539/2409/files/art_style_guide_video_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/53261758020.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/assumed_mean_method_for_grouped_data.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/35552854012.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/cumc_web_outlook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/woxiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/93394009727.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/juturewedumonogipewimif.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/sticker_maker_for_whatsapp_apk_mod.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_off00006423.bin
5ee62c8de27ee2aa7ff80c349e3e43521adcf08c681f5ad5824290dcd6bb2b98
pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 5028 bytes
font_01_sfnt_off0000752a.bin
478887a547d088dabbd0731f921386d761b9512f2504ce2a0042b2584c156c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x752A 10372 bytes