Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a4a23d14190558…

MALICIOUS

PDF

51.5 KB Created: 2020-08-29 05:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba12fb6431f4639a4dc2c92659104e97 SHA-1: f52af3453a67e2c832c470bf975502bb9ff953ed SHA-256: f3a4a23d14190558a6e462f8e9b0104558dd35ca604bbbee5e7e5302c6b2cd76
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector and a link farm, as indicated by the numerous embedded URLs. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=country+similarity+theory'. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, which is sometimes used to obfuscate malicious content. The presence of many links, including one to a known malicious redirector, strongly suggests an attempt to lure users to harmful sites.

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/wix?keyword=country+similarity+theory
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/heart_chakra_guided_meditation_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/gewipadigaxelo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0068/1880/files/map_of_us_states_and_capitals.pdf
    • https://static.usrfiles.com/ugd/b8c837_4483f4a2fa294bc5b413d194edd6d57e.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/rasujuvigijirokowajerija.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/hindustan_unilever_limited_products_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/87987137382.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/cation_exchange_capacity.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/fososibabim.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/12654978624.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/rexufexinisuwevumelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/jidine.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_off00008e3a.bin
084e2cd74180daf2f0ab670d20978516c38bbe8d4b6983b2f0cf6ce21df95eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 4932 bytes
font_01_sfnt_off00009ed4.bin
6a194a30e773fc6e0fd9ad360266614cee4166b033623bbe793cdd93281bdc81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED4 10336 bytes

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