Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d784d36356f31df…

MALICIOUS

PDF

51.2 KB Created: 2020-08-29 23:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33e7858abc3fc0310f433508d9fb17dc SHA-1: 334cb57357f2c86e8eccc6fa3b08d94272b02091 SHA-256: 3d784d36356f31df78e619f8d520a192103c935ae16a79d98db04483bc930a55
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple Shopify domains, likely to improve search engine ranking for the lure term 'ipl cricket game download'. The primary malicious URL, ttraff.ru, is identified as a redirector to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure with embedded links supports a social engineering attack.

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=ipl+cricket+game+download
    • https://cdn.shopify.com/s/files/1/0428/3927/7734/files/history_of_neoliberalism.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/pokemon_cherrim_sunshine_form.pdf
    • https://cdn.shopify.com/s/files/1/0454/0373/4184/files/cch_sa_file_b_li_font.pdf
    • https://cdn.shopify.com/s/files/1/0430/6812/9441/files/international_business_spanish_translation.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/problem_solving_in_mathematics_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/jugebiwopumutebaborewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/75602913897.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/68787549147.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/pusof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9477/files/nexupamidixirot.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/string_format_python_print.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/livro_epidemiologia_gordis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/fewewafabuwekozavixav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/tebamokiverebetomofokej.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://static.usrfiles.com/ugd/e2c250_56c5f204e91249ebbc82af1db20b1a61.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_off00007451.bin
fcad59fdb169d46c9feedb286e2cec1abd97924f9eef71c78a685d8875a664f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7451 5308 bytes
font_01_sfnt_off00008653.bin
c7c985514c7b681073835279dae593ec39a82a5e35472819d4004129fab6d239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 10128 bytes
font_02_sfnt_off0000a93f.bin
c6ef65f7be68b55e32afa9595db01e6fc8bcbb456cf1ae464c7e9ccadb6add26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA93F 16664 bytes

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