Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88fa1f6c1c14ec1…

MALICIOUS

PDF

42.8 KB Created: 2020-08-22 11:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36a4078f6e5ff1431d801618583aaa99 SHA-1: 2fa7862f8eb2a3dc91b980510e73f7a6ca60c5d6 SHA-256: d88fa1f6c1c14ec1564012a1f718c0f14cd30bf105e841d3e282f5a878ea3ba1
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=simple+diy+queen+platform+bed, which is identified as a malicious redirector. The presence of numerous links, many pointing to benign Shopify URLs but interspersed with unknown domains, suggests a tactic to manipulate search engine results or lure users to malicious sites.

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.com/pify?keyword=simple+diy+queen+platform+bed
    • http://files.cancerperks.com/uploads/1/3/0/7/130776447/lodowuxuwe.pdf
    • http://files.fisherphotoanddesign.com/uploads/1/3/0/8/130813524/logaxoluja.pdf
    • http://files.frenchvintagehifi.com/uploads/1/3/1/8/131856330/pefeja.pdf
    • http://japadegub.raimukherjee.com/uploads/1/3/1/0/131070487/b9845.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/zbrush_personal_learning_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/13518370399.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/bombsquad_mod_apk_unlimited_all.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/95947262902.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/76854237971.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/megalamavurubelokigon.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/lc_oscillator_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/81610262820.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/kindle_paperwhite_compatible_file_formats.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/67571728119.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/descargar_mapa_bilbao.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/vezelaruzoxixagixu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bb.bin
2e73d67230f5384279b65f81abd152e2152b5898b3ba027bcbc0f5eda0cb0b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5480 bytes
font_01_sfnt_off00007b44.bin
a89ecb8706c6432731a8d29495386c71ed9d9b454934b0133cc2ea89c3c5fe16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 10276 bytes

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