Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f07834a10934ca6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-23 00:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b0e25493ec2908991bc2e3b0d189c8d SHA-1: 871f5728f28da6e08ee6405c454f485ff72ea776 SHA-256: 6f07834a10934ca6f2a46c7af9cf14fa26eea10e16ecdecd93b107c26082c2bc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=my+airtel+video'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify. The document body, though heavily obfuscated, contains the malicious URL and appears to use an urgency lure, suggesting an attempt to trick the user into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=my+airtel+video
    • http://files.northopchurch.org/uploads/1/3/2/7/132741241/bizukilip.pdf
    • http://rijuwo.holywaterbooks.com/uploads/1/3/0/8/130814855/romagofosusezuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0465/2685/7374/files/cnc_router_cutting_stainless_steel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0047/files/ladumiguso.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/78117379834.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/mahalaxmi_calendar_september_2019_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/pasevatuworumarug.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/20064402947.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/englander_the_architecture_of_computer_hardware.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/befasorob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/learning_how_to_learn_jerry_lucas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4433/9861/files/ketuxezolidaguwaxonagetas.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_off00006175.bin
8c89fe1c3b9d86f2445052573f0ab185656b45112429f7fc94fd464525bb84e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 4808 bytes
font_01_sfnt_off000071ea.bin
092dffec4f856759d084ac217f1a118e3812b9ca7f35249b6d9d15227c60adfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 10340 bytes

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