Malicious PDF — malware analysis report

Static analysis result for SHA-256 466f4bf1ac73bce8…

MALICIOUS

PDF

45.3 KB Created: 2020-08-20 07:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e50ad8b10d62e12091bbc23cbfdc2f3e SHA-1: 13c2a7966d0ede610d16e7ecf9e2707ec713932f SHA-256: 466f4bf1ac73bce840925ded6d156e0b5e331ccf52dfe8c4428f532be2a13383
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Butterfly live wallpaper apk' and includes the malicious URL. This suggests the document is designed to trick users into downloading malware by posing as a legitimate application or file, ultimately redirecting them to malicious infrastructure.

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.cc/pify?keyword=butterfly+live+wallpaper++apk
    • http://wafipeva.your-us.com/uploads/1/3/1/3/131380625/6943829.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/kasoxotib.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/evertale_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/gunagira.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/bidagepobigubotatub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/kejowofosibaxumibinali.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/89202320954.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/wetafisuromo.pdf
    • https://cdn.shopify.com/s/files/1/0460/0781/2257/files/kadexorejuw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc7.bin
0fede8df2c36b0777a2555da741ad6c93bd97e3597e66c9c4694c63525da41df
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC7 4752 bytes
font_01_sfnt_off0000601a.bin
cdd062268607e19eecb5760d288d60653031d4628a33ff1b3d34c66e80f70b18
pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 10264 bytes
font_02_sfnt_off00008362.bin
3b85858225c4b7b348f26b92abaa26fa2d26a4e013f95e0dc5c94ec8139387b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8362 16792 bytes
font_03_sfnt_off00009a28.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A28 4324 bytes