Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6a69b76dc07f2a…

MALICIOUS

PDF

39.2 KB Created: 2020-09-06 02:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 70fb153b9efbb7a08fd709a852473162 SHA-1: 2c33cca4b1aa94158c096837bfba3a92faecf5d9 SHA-256: cd6a69b76dc07f2adcafae2fb98fe6e1b9cd5a0707de1fb996f559730b3b5bd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, including one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector.

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=platform+meaning+in+computer+language In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/epidural_blood_patch_policy_and_proc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/64476110640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/dajonug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/7129618610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9529/4887/files/xudakujodawulokekusopedo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f5cef_e0d6c8596e374045b151b7cfc9d8ff6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9219f8_da719db8a51742fc836662105b6b6507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/humidity_and_temperature_sensor_rht03_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/1212233559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3471/4017/files/archicad_tutorial_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/ruxirimesijokifop.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c0b427_2c3a16214c1a4b13bfc594501e12c889.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/40512e_30346191479842f5a8ee9fd5f41d831c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4bc37_e2275b0a91334e4ea9db27279dfda25f.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 5160 bytes
SHA-256: aa3f822a752f59fd3bdf7a343ffdd46a82fe7cf980483b09d3ca944686e33e1e
font_01_sfnt_off00006dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBF 10028 bytes
SHA-256: 7ec4bc2a87df1d6bfc916b8eb3b260e1b92c3e1e5c43e5626dd9230dda55c207

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