Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5ad8bfe453b8f3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 19:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c1b0b115a99ba24cdc2987bae37de7 SHA-1: 35c78ac94101ad0c69c7c459312ad3e566476851 SHA-256: 0d5ad8bfe453b8f3d0ff8c4e5bdcf5da4c16152b982ba42df46a586e6bd64f25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, appears to be a user manual, suggesting a lure to trick users into clicking the malicious link. The ML classifier also flagged this PDF as malicious with high confidence.

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/wb?keyword=samsung%20m2070w%20user%20manual%20pdf
    • http://files.shellbackcustoms.com/uploads/1/3/1/3/131397940/d6f2a990a29ad9e.pdf
    • http://files.baileylynas.co.uk/uploads/1/3/2/6/132681409/6d4d6e4b5.pdf
    • http://fowakitaw.zionlutherancc.com/uploads/1/3/1/3/131383363/47e4a70a.pdf
    • http://files.shaltmira.com/uploads/1/3/0/7/130738933/gakolape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/69809303214.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/15406182883.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2231/files/77646161500.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/27596209378.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/diketakefuvobanewitovi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8652/6102/files/37523882088.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/vadujinobono.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_off000054fd.bin
b2d6bfff6acd14ee43538765fe1f103315da177153678594e62e121748cba4b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x54FD 5908 bytes
font_01_sfnt_off0000690e.bin
7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 2268 bytes
font_02_sfnt_off0000731e.bin
36159988b7b7ea515ee97de228e69aa69eb130fe086d74450fd1b9d2fc8c2e88
pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 10264 bytes