Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67e45fcbbc2a4cb…

MALICIOUS

PDF

44.6 KB Created: 2020-08-22 04:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9877a61c612daa949ed84141ec85d7 SHA-1: 3b73c7c536ac53b4c5bd207d85290e0fd4a3ab97 SHA-256: a67e45fcbbc2a4cbaaa0ad8e12251d5acab7de308717cdef6e5ccd4e24382974
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'medal design template free' and includes the malicious URL. This suggests the PDF is designed to trick users into visiting malicious sites under the guise of providing a design template. No scripts were extracted, limiting the analysis of specific execution chains.

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=medal+design+template+free
    • http://pugokoso.livingourpotential.org/uploads/1/3/0/8/130873851/6991988.pdf
    • http://files.artdwellers.com/uploads/1/3/1/4/131406369/jerusakesiridaruta.pdf
    • http://files.louisescott-bushell.com/uploads/1/3/1/3/131379801/7389591.pdf
    • http://rutopatil.brewercustomguitars.com/uploads/1/3/2/7/132712348/5010155.pdf
    • http://gusibina.flashforwardphotobooth.com/uploads/1/3/1/4/131482975/5f9758.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/autumn_leaves_saxophone_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/56997866296.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/loxima.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/72412143478.pdf
    • https://cdn.shopify.com/s/files/1/0463/3228/0994/files/lovajofapidukupu.pdf
    • https://cdn.shopify.com/s/files/1/0451/0230/1349/files/ben_10_alien_creator.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/machinarium_free_full_version_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/lugaguliponinabuvobizeda.pdf
    • https://cdn.shopify.com/s/files/1/0449/3400/4891/files/fashion_guide_for_skinny_guys.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0625/files/15564081461.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/zasasov.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_off00006603.bin
cc6a7bf7ea9d6f545f694481e113c54f971f39c92dfaff3d494470e94629a4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 5364 bytes
font_01_sfnt_off00007829.bin
72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 2268 bytes
font_02_sfnt_off0000823b.bin
60aea91d9bbceda96ef40d53a0a4cc11090bae7cc49e045fe55fb98f324ade44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823B 10132 bytes

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