Malicious PDF — malware analysis report

Static analysis result for SHA-256 f547d3fa49bd784b…

MALICIOUS

PDF

54.8 KB Created: 2020-08-14 22:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbc92fcad1762ea1aecce1f28d6a0781 SHA-1: 0099b118e1cabf3528a6663ea13d705591f10e49 SHA-256: f547d3fa49bd784b07f2341c0fe898e082c9217c0c4c309a99ce3e456d935bfe
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bug+report+meaning+in+marathi'. This link is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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=bug+report+meaning+in+marathi
    • http://mejar.96fabrics.com/uploads/1/3/2/6/132695569/juveku-pupivapijed-xupedirugipu-xobemamatugefof.pdf
    • http://files.wookles.com/uploads/1/3/1/8/131858661/goduxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/fugijinin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/35040316077.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/40134710647.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/paypal_custom_amount.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/how_to_backup_notes_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0438/3703/0560/files/computer_accounting_with_sage_50.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/kikiluj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/mipawuzibirofadefowewex.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/vanexabuvamopajumumajof.pdf
    • https://cdn.shopify.com/s/files/1/0432/4265/1816/files/rugomulufide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/32797770367.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005169.bin
805365a321e10ec073adf54b9c8e5a0bb4095ead2880e2b5b9d738bde5d52c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5169 5072 bytes
font_01_sfnt_off00006276.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 3720 bytes
font_02_sfnt_off00006dd9.bin
c469ddecab84ad7d2bd64569023fab700f4348675ff2302a8f0c0c1083ee3cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 10496 bytes
font_03_sfnt_off000091fc.bin
6f17b99764d671a96c0d2fd0b5f339513c2ddbf7efa5d755f63b897ad21dd613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FC 16064 bytes
font_04_sfnt_off0000a6c7.bin
fc3cfa9727a07898ecb0dfc22afb77320632d3f4e2bcd50d886fa27a39eb1bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C7 11400 bytes

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