Malicious PDF — malware analysis report

Static analysis result for SHA-256 765808d3c468266b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-30 23:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b90a44591c81c855a058ef34f3f040a SHA-1: 41142a64128e31022ca5b134fd47e8e32a6a727d SHA-256: 765808d3c468266b629629d7ccbead84bb9a3a065255db5105c89a0a59249245
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure related to 'fondant cake decorating for beginner' and embeds numerous links, including one to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm designed to direct users to potentially harmful content. The primary malicious IOC is the redirector URL, which is likely used to funnel traffic to further 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/wix?keyword=fondant+cake+decorating+for+beginner
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/79594322153.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/rapalokokifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/jeperaxapolajo.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdf48394d8ce44e69f5f53235c93fd4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a36348727c4e4a8f130218f187521d.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/tudema.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/15028738269.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0459/8166/3399/files/abematv__android.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009108.bin
4aa67b85cf8b1fa951811217a84c7bbfa4806f4596316a068148abef26342a16
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9108 17856 bytes
font_00_sfnt_off00005d80.bin
e6f7e021503602d95908a9cad5e64cafbbc4664cadb8d5375b61f26aaf3cc2c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D80 5140 bytes
font_01_sfnt_off00006f16.bin
98ff5cd6b97f89b05ee8901a98ff3220a7ac37e6f87c2b07c5944f27e36012bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F16 10072 bytes