Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad764a7791965932…

MALICIOUS

PDF

48.4 KB Created: 2020-08-23 02:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fab0c074d16255d3320170dcb7ebd01e SHA-1: 7fc35a0a608088f53e23ca5d57d5322b5c826c3b SHA-256: ad764a7791965932c375887ca10e81b2dd932e3cae76f8001e87a763b3f8f748
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.ru/pify?keyword=womens+platform+shoes+cheap', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous links, including one to a known malicious domain, indicates a likely attempt to redirect users to malicious 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.ru/pify?keyword=womens+platform+shoes+cheap
    • http://witidov.kelsrodreel.com/uploads/1/3/1/4/131483281/759772.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/fo4_console_commands.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/booyah_showtek_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/lukaved.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/48783294444.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/aquatic_biomes_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/ragnarok_hunter_leveling_guide_iro.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/fosebefarupexovekozupexub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/deberujosomumabofurenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1491/files/dopiduxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/guxevopugesojisabepoxowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/ponolejeratoxiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/keboliratupeforumajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8795/4073/files/65359295130.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_off00006be6.bin
abf716a2f7ce10ba83cb2b8d4ef5f03a49218429c24237bcbd1d78c6a5f67ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 5008 bytes
font_01_sfnt_off00007cbf.bin
cbb464fc3b9554180fe9dc4e489779ba99a774dcfdf4da5ebee307b9e39d6466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBF 13368 bytes
font_02_sfnt_off0000a703.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA703 4324 bytes

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