Malicious PDF — malware analysis report

Static analysis result for SHA-256 245fe9a1cf104c50…

MALICIOUS

PDF

43.1 KB Created: 2020-09-01 00:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a772cb4c94f6ee29a6336829e3e6a431 SHA-1: fbf500c29d97dcb5f1d037d7a97d33b2cc275060 SHA-256: 245fe9a1cf104c50c01704c8d13233e9f02dfed0b9001f5b639e90b80f14a85c
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL disguised as a seminar on anti-lock braking systems. The primary malicious URL, https://ttraff.com/wix?keyword=anti+lock+braking+system+pdf+seminar, is designed to redirect users to potentially harmful content. The PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into clicking the malicious link.

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=anti+lock+braking+system+pdf+seminar
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/80153457286.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/vatodororulono.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/genofamigosefox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/passport_application_form_for_minors.pdf
    • https://static.usrfiles.com/ugd/bb13a2_ae7f93d542b247c2a7e81904fef1528f.pdf
    • https://static.usrfiles.com/ugd/857e61_fc2dba59d48e4b46a40eaea0a4156375.pdf
    • https://static.usrfiles.com/ugd/e23fbb_2ec5c450a91c4b6d8787a8abc195d823.pdf
    • https://static.usrfiles.com/ugd/3be3a7_a7ef660fce3d424286dbbfcd78b73503.pdf
    • https://static.usrfiles.com/ugd/162fe6_de46ffac4b964e54bcaf3d11d95aae8f.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/kujozogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/buvexoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/demurulatorafumozejok.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/juxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/honda_crf230f_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/kudipenen.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_off00006a16.bin
941a5ced7f2c47f183459777016ea92d7c39a254c0a199958703ae636535c4e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A16 5768 bytes
font_01_sfnt_off00007db1.bin
6ec9ead031d2cceabc19f07d887fc3f4150d0bceaf9ba31c926136e75c07c419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB1 10044 bytes

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