Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f6f5c9d14f7b69…

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 15:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd3e7cb5e254aad29acbf3b5bf403fbc SHA-1: 8503dfa9114d8dbc6c6b4a4ce9fb17fd7402c6d4 SHA-256: 59f6f5c9d14f7b69cfaa1794e75d832f175ba512b94dd39a7232889e6996a5af
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains text related to 'how big does pomeranian dogs get' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=how+big+does+pomeranian+dogs+get
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/gomuwozew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/51408378216.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/sawotevekono.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/zegekizenote.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/our_casuarina_tree_critical_appreciation.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69bc9f6b1d746459ab5fe9d771c4fa2.pdf
    • https://static.usrfiles.com/ugd/e02969_2f4bcaa4e81f4d35904a32dd881a67a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_74942d65a4a642b8b780e8b884f61fd6.pdf
    • https://static.usrfiles.com/ugd/8b2c09_7c0a42f4df484b20ac446e12b14dd15f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c3f0db402aa4661add6d593c1d3be1b.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_off00005bd5.bin
423532ab373d3787224f3b866f5e196733a98d80aae033d961da183b940f24e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD5 5440 bytes
font_01_sfnt_off00006e46.bin
a258f0891a7611fa54904c57789faa68978cbc812cb92ae63404c7793f7040e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 10164 bytes

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