Malicious PDF — malware analysis report

Static analysis result for SHA-256 9303a506a66c512b…

MALICIOUS

PDF

57.4 KB Created: 2020-07-24 18:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc19f17e2846c1bd4893424cc9ba48a4 SHA-1: 60f20b3bc1885241a37437ad663ad7c254a08e85 SHA-256: 9303a506a66c512b5c56f4df62fa3fc4b83c5cc5a27f4d8fe05b7eb3815c0ea5
152 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=aimsun+6.+1++free'. Additionally, it hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aimsun+6.+1++free
    • http://files.jcaweb.net/uploads/1/3/0/7/130738991/bikopomotul-jumuvizanebuw-dijufup.pdf
    • http://files.nearcoadvisors.com/uploads/1/3/1/6/131637853/beveta_xokewamunujojeb_divowabawilupu_xuwubawo.pdf
    • http://files.glenelgcp.com/uploads/1/3/1/3/131384401/nakisixapinixusonufo.pdf
    • http://files.the-nmo.com/uploads/1/3/1/0/131070982/c8270.pdf
    • http://files.holostherapies-edinburgh.com/uploads/1/3/2/3/132302764/e876caf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/jagujulevaxixipumowojotes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/48257507469.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/labopalaxiberovubigaxej.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/zitajuniguf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6288/5541/files/72056975961.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/wesitumijotetoxuneno.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/80622890777.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/tofividusomikukeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3523/files/tibadamasusesodalamoxoli.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/60646502049.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/gawalafakuloxupugutiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/99197280384.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/zonamekibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/bumonatovukizifeludesamul.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_off0000a4b8.bin
db020a92eff029b4f9836d12ff45e94e46604cf850887712385a3440e3663474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B8 4592 bytes
font_01_sfnt_off0000b42d.bin
9ab94b320decc6d5946be7890272365a5c608e17a44c8213852b0b3011f668c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB42D 10544 bytes

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