Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c84d60b4b9d2ed…

MALICIOUS

PDF

58.3 KB Created: 2020-08-10 15:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc8863b6f59ce254fcc577cc21e909b SHA-1: 480b42971faa57fe3f0cafaa05ac4fae5b48afff SHA-256: 33c84d60b4b9d2ed3f7ab4e36df38247714a6f4ef146d07637bbe98dd9fbec5d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=alouette+helicopter+pdf'. Another critical heuristic identified a PDF link farm hosted on Shopify, suggesting a broad distribution effort. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of malicious redirector links and a link farm points to a delivery mechanism for further malicious content.

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.com/pify?keyword=alouette+helicopter+pdf
    • http://files.jyefinancial.com/uploads/1/3/1/3/131381204/joposanex_vopuxo_tofidapej_dosuputev.pdf
    • http://files.thegullyshop.com/uploads/1/3/1/3/131379650/taxegobezujateju.pdf
    • http://files.clatchetproductionsllc.com/uploads/1/3/0/7/130740521/molexezubusaset_gobukimobeferom_xitijexibuvisi_gejodajatexuf.pdf
    • http://nawope.bangpleelanguageschool.com/uploads/1/3/0/8/130813528/ea561786.pdf
    • http://wetib.jeffreyowensproductions.com/uploads/1/3/0/8/130814297/fajig_dedokavuvus_kawidapiboba.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/47552804040.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/mujofulofuwubeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/ditufimazorevetiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3204/9824/files/download_hallelujah_chorus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/58507437713.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/nifiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4632/files/transformer_bushing_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/mike_epps_baby_mama.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/95655940879.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7101/files/wawojevedilowukolurifu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/dagivotelux.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/digital_platform_economy.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_off00009a3e.bin
921ded799d762a862a051a79529dd22371542e4bd932103d20f84fc54ab6991a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3E 4620 bytes
font_01_sfnt_off0000aa0f.bin
24eca2d393aace3482c5def9fa8f00f051d7d00207c40f6cc5ab8f4a5e9ad484		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA0F 10920 bytes
font_02_sfnt_off0000ce56.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 4324 bytes

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