Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a584e07241b5f4…

MALICIOUS

PDF

52.2 KB Created: 2020-08-02 14:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a4d27151470a57a5cce83d3df82bd5 SHA-1: 675c0042668add0042907304fdb897b333c35212 SHA-256: b3a584e07241b5f4f65e1d7b414075c68baa0ca59fc8d09c7cf0c538d27494ac
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body text, though partially corrupted, includes the same URL, suggesting a lure to a malicious site. The presence of numerous other links, many hosted on Shopify, indicates a link farm designed to obscure the true destination or spread malicious 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=alaska+state+abbreviation
    • http://files.teamacorntriathlonclub.org/uploads/1/3/1/1/131163859/7829059.pdf
    • http://files.millimanquarterhorses.com/uploads/1/3/0/7/130738765/rujefimodedizi.pdf
    • http://files.michaelazoe.com/uploads/1/3/0/7/130775292/804390.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/faxoxaxizawomolirudoni.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/dapuzagopifixotefiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/49938108263.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/73231044938.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/40573109138.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/vazidisebebawinukaxositos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7651/files/95857575863.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/kenejezezojuxoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/63176695821.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/foxy_roxxie_ssbbw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/36231162360.pdf
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/53064336921.pdf
    • https://cdn.shopify.com/s/files/1/0428/1486/5575/files/40822526249.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_off00008522.bin
0d45d82a678fb2ed6e69c0398125df426559d8194e4dd013e62ef6fe43182399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8522 4932 bytes
font_01_sfnt_off000095fc.bin
501174110036a2ae94f9d3a9f19a2d8ac9baf368edf98a841683565fcf324dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FC 14972 bytes

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