Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a6a24d4ccae746…

MALICIOUS

PDF

36.8 KB Created: 2020-08-10 13:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac689e9f95eb6aaa1a960155c49c2fb9 SHA-1: 9303cdb4848c01e4ba713f86cd56c91d832ed226 SHA-256: a4a6a24d4ccae746c5dd4c2bc3692cd6267519aad67a3b8325107ff7ce30817d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to a 'Cessna 310 pilot operating handbook pdf' and includes the malicious URL. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites, with the primary malicious URL being the highest priority IOC.

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=cessna+310+pilot+operating+handbook+pdf
    • http://dogaxir.d16armor173rd.org/uploads/1/3/2/7/132740214/muvusiruwedakus.pdf
    • http://files.patrickdeanhubbell.com/uploads/1/3/1/4/131454034/7177565.pdf
    • http://files.neuroenlight.com/uploads/1/3/0/7/130740429/zorisinatal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/the_walking_dead_full_episodes_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/how_to_reverse_linked_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/37139193219.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/vewudomimeporijotava.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0448/9333/9803/files/cession_vente_vehicule.pdf
    • https://cdn.shopify.com/s/files/1/0434/6626/0642/files/39281668224.pdf
    • https://cdn.shopify.com/s/files/1/0436/5064/6169/files/bridger_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/85803978031.pdf
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/gravity_hack_quizlet.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_off000050e2.bin
f51527b39581774e0db0d2018a827dcef92930adec83234f2ca1974914dbb4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E2 5768 bytes
font_01_sfnt_off00006470.bin
64826a994e6f91ec77fac39e0bca9f412007773c7bef7f2b0bc24d445957da77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 9904 bytes

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