Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e18d6fd2667473…

MALICIOUS

PDF

47.4 KB Created: 2020-08-08 20:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5997a3ab3ef3e34a6af96f8cd75466de SHA-1: 0a1d24b12fa2f0c05720a612a0ff11518c858ca6 SHA-256: f1e18d6fd26674738e75895da7ce50c924b307c32e89e74206d3fc0a7db70388
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, contains text related to 'makalah angina pectoris pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious content. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination. No scripts were extracted from this sample.

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.cc/pify?keyword=makalah+angina+pectoris+pdf
    • http://files.malovicmak.com/uploads/1/3/0/9/130970004/3647513.pdf
    • http://files.alexarainewright.com/uploads/1/3/1/3/131379894/kavojusagoposinaret.pdf
    • http://bawez.tapcanada.com/uploads/1/3/1/4/131453247/zizad_kojudufoburodi_mabito_ferimafu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/jukinapupupirireb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/36906747059.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/42144215093.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/download_abbyy_to_word_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/moxulatodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/18766751773.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/wojidoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/85332214981.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/kaxovegevavilonumuge.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/suzuremavavumavuxabed.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/72560690559.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_off0000752c.bin
b7dfa8972ae07da1c90939655a52fa913330eafb39be13b87877dc38a2d97376		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752C 5484 bytes
font_01_sfnt_off000087da.bin
e9b14df3fdba16dc6a1fadc9215183143616f979e78c8275bf289de5c30ed671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DA 12552 bytes

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