Malicious PDF — malware analysis report

Static analysis result for SHA-256 53aa96e76ffaf153…

MALICIOUS

PDF

34.4 KB Created: 2020-08-31 05:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a06405fc5d5615e31c5ea980a500a43f SHA-1: 126e2faa5d8de99c2028d9d741a31dca7b0e4651 SHA-256: 53aa96e76ffaf1536399a823f4724aa9b7adf53a58de084f0c3e215556d58ced
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, many of which point to a redirector service. The primary malicious link, https://ttraff.com/wix?keyword=systems+analysis+and+design%252C+11th+edition, is designed to masquerade as a link to an academic paper, likely to trick users into clicking it. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector.

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=systems+analysis+and+design%252C+11th+edition
    • https://static.usrfiles.com/ugd/b8c837_1e0f500d713148e38461148786b0980f.pdf
    • https://static.usrfiles.com/ugd/455f95_80032cea08a44c26bbf1b7fdee38d176.pdf
    • https://static.usrfiles.com/ugd/b7ed05_9e3f5fb372644b899a85220584bde133.pdf
    • https://static.usrfiles.com/ugd/ca300b_0b9fdd1f02fc4822ba5245dae96da776.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/kaspersky_trial_reset_90_days.pdf
    • https://cdn.shopify.com/s/files/1/0457/8652/9948/files/77617729275.pdf
    • https://cdn.shopify.com/s/files/1/0433/5019/6389/files/63149304969.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/rubirekidelaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/bigej.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/cuore_nero_amabile_giusti_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/potuxemi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4935/1328/files/vutexuduziwanunosasuwevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/74505579360.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/amazon_fire_hd_8_7th_generation_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8718/3515/files/19322713640.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/bgp_interview_questions_and_answers_download.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_off00004871.bin
dae7f1bbd2fae131d69bebb42b356336859bf26388faddaa854bcffc03905bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4871 5456 bytes
font_01_sfnt_off00005ae2.bin
a863b2062a1fc93c6f6c7d4b5abffae63d137a655d0971fbe61a1efe159a9b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 9828 bytes

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