Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fba5d46ebfea2b…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 02:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b15abe680ae37770459b14df859440 SHA-1: f879e26a629867fbcfaf2a6dd82aac5e10046992 SHA-256: 10fba5d46ebfea2bc893845ff7b1db4a24d9afe019fd25fc759a1351ce1c48e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a link farm designed to obscure malicious destinations. One prominent URL, 'https://ttraff.com/wix?keyword=chewbacca+sound+clip', is flagged as a malicious redirector. The presence of a large number of external links, including PDFs, suggests an attempt to distribute or host malicious content, likely delivered via spearphishing.

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=chewbacca+sound+clip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/miroxejevemebi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/kowarekake_no_orgel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/21085932375.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7381071972346f296888b70f5ad0415.pdf
    • https://static.usrfiles.com/ugd/5ecadc_276db9e21042465ab6dfbd6fcfb954d8.pdf
    • https://static.usrfiles.com/ugd/a18aa6_20d916a2498b4441bfe63cf69095b8da.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebde97c9831a409f89ba9c58fb04b2ee.pdf
    • https://static.usrfiles.com/ugd/a44510_d4a0e87d6d60421ab75050e05e411da9.pdf
    • https://static.usrfiles.com/ugd/de60da_673863ea3112461ead6082af65c3444d.pdf
    • https://static.usrfiles.com/ugd/2f7815_b35df371bedd48c3aa807d46a61136a4.pdf
    • https://static.usrfiles.com/ugd/de60da_44973efffe8040e986c0f0e2c4186765.pdf
    • https://static.usrfiles.com/ugd/c068f8_207818b9c05a42b5a989505509a64daf.pdf
    • https://static.usrfiles.com/ugd/8acad3_7cb1bf2bac494a9ebcd9dead73ed80b5.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9e.bin
19d9f590e63d8e2fa43711f478a6d416e7a3299920b153a3f288c4fee928d9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9E 5204 bytes
font_01_sfnt_off00006e53.bin
29a309be808e3b5bf5618353f83eddeb034c9331768f02e847f3df347c4ce4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 10312 bytes
font_02_sfnt_off000091eb.bin
b0c9f70c58c775764b006f2b38d30d8bb136da6459b650c354cd8113ed439585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91EB 17240 bytes

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