Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca69842faf663fbf…

MALICIOUS

PDF

44.4 KB Created: 2020-08-04 18:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c8633d687454a2648ddd765a5913d6 SHA-1: 5d71c4b9245fc644674c80909de9f02d57375bae SHA-256: ca69842faf663fbfcdebbb0f00224def104ceaf51d73f588d2f2d6cd6de3f42f
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'Cambridge ielts vocabulary english to bangla pdf'. The presence of multiple Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking and distribute malicious content. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive document.

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=cambridge+ielts+vocabulary+english+to+bangla+pdf
    • http://files.floridaconferenceecec.com/uploads/1/3/0/7/130776033/fukidozofituv.pdf
    • http://files.bikefortibet.org/uploads/1/3/1/4/131410370/papatalowis.pdf
    • http://files.kerenvishny.com/uploads/1/3/1/3/131379496/gapufojofuwu_bizaf_xiguzakume_taroxipeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/ribesoraxokuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/pancake_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/33450578498.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/gamuwimozediwonosidil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/tovimiwejowemuwasidajoxul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/vuzug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/setibodusadujuxudopi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/95567543507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29883534071.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/87915213015.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2200/files/57183091878.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6371/files/29806831721.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/55536602560.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/kx_155_maintenance_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004673.bin
32a49cbdef3a2cb32668f7ce32d4964aa966c5acb42c47dedbd4e789d0ef3e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4673 5776 bytes
font_01_sfnt_off000059f7.bin
8404b87578dcc12e4ba1540e37e64a228fe4428f2a8036b3fa714d3d79e7233f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F7 8108 bytes
font_02_sfnt_off00007405.bin
af719ccf02d811ce36ae01685f3977f584927e8f22364c527425d8157c34845d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 9252 bytes
font_03_sfnt_off000092c6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C6 4324 bytes

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