Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f02ce30f0244bcc…

MALICIOUS

PDF

43.0 KB Created: 2020-08-25 14:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aedd6a0f89c56772d2f92c1b7fb8f436 SHA-1: 3e94772b0f116b55e43924ba70760c4d9768f2eb SHA-256: 0f02ce30f0244bccd1e03a83207079eb636ede6c59256a4612d997870ec57755
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a potentially harmful site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=best+free+fitness+challenge+apps+for+android
    • http://files.gulnurozdaglar.com/uploads/1/3/2/3/132302913/38e83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/ada_lovelace_ielts_reading_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/92025917753.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/kinapobepigej.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/54874453393.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/60086099734.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/61996115984.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/burnham_boiler_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/dictionary_app_sinhala_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/hamito-_semitic_etymological_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/9613/6098/files/81730210317.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/compare_two_arrays_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/63142299427.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/vegitokukati.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_off00005ea6.bin
075f1744faadcece3c99a65245b8211aef13a28cd1c6c7f867af34d6705b3ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 5256 bytes
font_01_sfnt_off00007075.bin
c4346d4a00b89cd0a951abe6a3018788e85f7e135addbc0b5793cc7bdd6f084c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 9552 bytes
font_02_sfnt_off0000910f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910F 4324 bytes

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