Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0bf4f795f53660…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 16:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb2e449b95d4e4e64dd320649a48e8d SHA-1: 02f10a3baec4988fcf3f1860ed214a602f9f641d SHA-256: 1d0bf4f795f53660182040896bacfcc38d7424162d80b7469e4e2541dcbfe551
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 indicating a malicious redirector link. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=grim+dawn+hallowed+hill'. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a link farm designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=grim+dawn+hallowed+hill
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/bifipimexipifezufusipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/65964955602.pdf
    • https://cdn.shopify.com/s/files/1/0433/0074/9467/files/experimento_bobina_de_tesla.pdf
    • https://static.usrfiles.com/ugd/6f58fb_adb206e7ec5c45d99f983b0968f7683e.pdf
    • https://static.usrfiles.com/ugd/40512e_c63ed8a843134977ab37078deae04005.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_998dfacac069493b9cf9c321a14ed20b.pdf
    • https://static.usrfiles.com/ugd/0a0016_35119ae1363b4758b34b817f58412582.pdf
    • https://static.usrfiles.com/ugd/fd3290_41de9b73b3fb440eaba31ac16eb921ad.pdf
    • https://static.usrfiles.com/ugd/a1fb72_876554cb748c4569b94e838cbd8bd3ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b5e280cb0054cf3b2372c6986aacf90.pdf
    • https://static.usrfiles.com/ugd/b8c837_81ca39a2bb984dfaaf0607ac5dc7eed3.pdf
    • https://static.usrfiles.com/ugd/de02f3_78d5fd065ae54fc4a5bcb49a40c3b393.pdf
    • https://static.usrfiles.com/ugd/a18aa6_b6b8e051bea547d1b7afca2d33ca38db.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f1b9f5a88e84d1e847c33a712fe93b2.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_off00007328.bin
175fa3ed02b0b65a2f7c9e3ae83b3bb59072931fb9ae40dc66d3517d8e84deff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 5008 bytes
font_01_sfnt_off00008414.bin
bf8e110a55108a24b51562452220a5e24c29cd14c1aadec05e53b235f214a220
pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 11028 bytes