Malicious PDF — malware analysis report

Static analysis result for SHA-256 914d7f6219008a6f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-21 02:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b825b9d50fc0bf91feb8ab38b5087829 SHA-1: 533abc48057390cca8938d625c4095f5fec18ec9 SHA-256: 914d7f6219008a6f2e9fb0dda5ad813bf660a4d4f26a622416b77c8fed32e2c0
150 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure related to calculating gestational age, but its primary function is to act as a link farm. It embeds numerous links, including one to a known malicious redirector at 'ttraff.com', and many others pointing to external PDF files hosted on Shopify. This suggests a campaign to drive traffic to potentially malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=formule+pour+calculer+l%2527+%25C3%25A2ge+gestationnel
    • http://files.illumepilates.com/uploads/1/3/0/8/130813834/3996652.pdf
    • http://files.wildthingyogaboutique.com/uploads/1/3/1/4/131406036/ef2677d7e52b41a.pdf
    • http://veruwajit.trinahoadleyphotography.com/uploads/1/3/0/7/130739775/gumojemewa_nobemedemim.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/cch_crack_file_b_kha.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/14493102565.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/kunotamaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/69373056486.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/81457981406.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/19318047737.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/anatolian_languages.pdf
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/bolelitidajosamiguri.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/nitrogen_fixation_by_lightning.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006182.bin
a6aaf1e97247f21f71d9b90ca9a4f4d75274d1326ac04c1b24bbf994988eae11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5484 bytes
font_01_sfnt_off00007390.bin
307beeb6f5d471a0e44881d3d4383b6a0cba2a339dca1d6e026efc4cfa606653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 11992 bytes

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