Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac42b9c2bf08f1eb…

MALICIOUS

PDF

47.4 KB Created: 2020-08-27 18:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 712e4b97fbc821ba5b9f28cb85abc0e7 SHA-1: 54893935b5b4d9ecfdee0665fa0d8ef20382c9ef SHA-256: ac42b9c2bf08f1eb9e63879c5f70aa0f0fd600db43a90d109acb8d2a672f9627
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a calendar PDF. This indicates a phishing or malware delivery attempt. The document body and embedded links suggest a lure related to 'Kalnirnay 2019 marathi calendar pdf online'. The PDF also contains a link farm pointing to multiple Shopify-hosted PDFs, likely to improve search engine ranking and distribute the malicious link.

Heuristics 3

  • 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.
  • 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=kalnirnay+2019+marathi+calendar+pdf+online
    • http://tefanubum.talamofood.net/uploads/1/3/1/4/131437089/66161.pdf
    • http://files.bronxleadershipacademy.org/uploads/1/3/0/9/130969054/882463.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/folojekufufobadopawuwevat.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/19925411067.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/31952581226.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/english_grammar_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/zoxefitabepekaxajawoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/1273069039.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/48749812701.pdf
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/5966739091.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/15734923378.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/fepuri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/54358721864.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/5309702239.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_off000051df.bin
0bdc5d32c17a7ab9f79057e8694c1f02302349fdb63c515e2c2b41205d05b03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DF 5772 bytes
font_01_sfnt_off00006567.bin
fdb60f59b576a43bb8c21d93a92b7504ef310cdd721b4a471a38e26206c607bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6567 10076 bytes
font_02_sfnt_off0000880a.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880A 16164 bytes
font_03_sfnt_off00009d5f.bin
a0237da2ba6f7d0b862c21bbba5b6eb9f46d0a62d33dbf6d93c3da7886ced467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5F 5112 bytes

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