Malicious PDF — malware analysis report

Static analysis result for SHA-256 e986b4b72d1b3853…

MALICIOUS

PDF

79.5 KB Created: 2020-09-14 00:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec2678f6da9417d85adab8ee94d544ff SHA-1: e3df894622982c3b824dbc9252bfd162bc341841 SHA-256: e986b4b72d1b38539fa23363328e7a73cb1f16502ec570bd4ac4c98f505fa714
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, likely as a distraction or to obscure the malicious link. No scripts were extracted from this sample.

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.ru/wix?keyword=life+cycle+of+a+praying+mantis+diagram
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/fafomazafudikosafokaxug.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/vojixajuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0103/files/wokaxerufovub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/free_printable_double_bubble_map_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/what_watt_bulb_for_scentsy_warmers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/all_tv_channels_online_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/vomuparibumuxusodukaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/68109814530.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/l_adjectif_verbal_et_le_participe_prsent_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0486/2469/7509/files/9376766963.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/aprendizaje_significativo_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/97828197104.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/google_chrome_version_74_64_bit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec41.bin
b3cb1f86a8dd586ed6584c18ba8853fba437fdfe19298226d6bf4e91d6a68c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 5516 bytes
font_01_sfnt_off0000fef8.bin
b744d20329a21ba1921c870a4deaacb4064f710d75eb1a58e31c0067c31195cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 1716 bytes
font_02_sfnt_off0001079e.bin
7a6474ddb79b541ac40e41db09b8d1514088e1a9b7304b782d4d98017f1dfe4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 12720 bytes

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