Malicious PDF — malware analysis report

Static analysis result for SHA-256 633ba34b07725c5d…

MALICIOUS

PDF

56.1 KB Created: 2020-09-01 03:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208d34b2714188a5444cf24f5f4b0518 SHA-1: 095b1612a688cb23cc3ab9b99b802b523db1182d SHA-256: 633ba34b07725c5dae05957cbcb12e670b7dc37bd8369f71206f31af9b8bd32c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.cc/pify?keyword=android+data+binding+vs+viewmodel', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, reinforcing its role in directing users to potentially harmful content.

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=android+data+binding+vs+viewmodel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/tusolasexaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/79257159375.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/asme_pcc_1_appendix_d.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/cheddars_menu_prices.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/59138301364.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/96645516902.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/fivopilifedulex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/vinuwimewegefedigiles.pdf
    • https://cdn.shopify.com/s/files/1/0446/4400/8099/files/zexobazavezut.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/bose_wave_radio_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/y_the_last_man.pdf
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/vivarofeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/jerokibebeze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/vebajotogukowi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c8.bin
a2b0c38fcb04295220b0467c3c2380b2c20635d73b78b035fb2a8b6fdd86bfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 5216 bytes
font_01_sfnt_off00009479.bin
7c6df0c7ba6d352eb51dbe4d15d11eb73b750b08d77d1b6e979a13516a66e39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9479 15420 bytes
font_02_sfnt_off0000c4eb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EB 4324 bytes

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