Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ddd44de10f8184…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 13:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81a85d3fce95e86169d0af489a8c4f8 SHA-1: e0c4269d99d06bfc674a87e4d62fc87215ba392b SHA-256: d5ddd44de10f8184367b0358fd9025cc8bb6d7cb9aa86adee4441ef9bb10a8f1
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm. One critical heuristic identified a redirector link to 'ttraff.com', a known malicious domain. The document body, though partially corrupted, contains the same string as the malicious URL, suggesting the document's primary purpose is to lure users to this malicious site. The ML classifier also strongly indicated maliciousness.

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=each+day+i+live+galkin+sheet+music
    • http://files.padmacandra.com/uploads/1/3/1/6/131606175/67cb0ae22.pdf
    • http://files.mollywinter.com/uploads/1/3/2/7/132740260/429288.pdf
    • http://files.cullensailworks.com/uploads/1/3/0/7/130776162/binovipukaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/51819046968.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/tozeligagedizuf.pdf
    • https://cdn.shopify.com/s/files/1/0454/5295/1704/files/seventh_day_adventist_church_stewardship_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/12686489641.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/nuladunuzuzujegife.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/59653083480.pdf
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/performance_appraisal_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8266/files/kugul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/namisezawuwinosexot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/rofuzike.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/30274132993.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/bristol_stool_form_scale.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_off00005fa6.bin
a7a10a816005be471afbba96fe806cebefda3af797b68b7e727230d26181d157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5440 bytes
font_01_sfnt_off0000720f.bin
c439d22275f72cb2004f651693861469d735a35158033eac52db90957c93d7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720F 10580 bytes

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