Malicious PDF — malware analysis report

Static analysis result for SHA-256 6197101e24638509…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 18:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad16f5e144cbaffbeb26516a966e92c SHA-1: 4d77ed98f693d18cb5b93ab91f3bd3a797c01303 SHA-256: 6197101e2463850939e95fc86afc8e37f35de572d0ec7018d0d26d175cdd946e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, disguised as a 'sql server dba cheat sheet', redirects to malicious infrastructure at 'ttraff.cc'. This suggests a phishing or scam attempt to lure users to 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.cc/wix?keyword=sql+server+dba+cheat+sheet
    • https://cheatography.com
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6992/3743/files/kumanifadudiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/65611086554.pdf
    • https://cdn.shopify.com/s/files/1/0465/1561/7950/files/49211467805.pdf
    • https://static.usrfiles.com/ugd/b8c837_bafe44b636f941a88a8734836f0c4a9c.pdf
    • https://static.usrfiles.com/ugd/b5472a_ad9872907fd64194b4ab4548e5a8d9fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e7b55853824b1d8aa276587fab3c5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dec77c6d46b470ea3f56922e1c7dda0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3f6b4ee8161407194d91592018acd25.pdf
    • https://static.usrfiles.com/ugd/857e61_24b3aea6183446b68af180a059c14861.pdf
    • https://static.usrfiles.com/ugd/724bd4_7e51856d4b4945ee9015e8752626f42a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb3c0af041040bc9a71bebce3e967af.pdf
    • https://static.usrfiles.com/ugd/b8c837_39521c72e508469eb1881f03761e2d75.pdf
    • https://static.usrfiles.com/ugd/b8c837_439bb322d2284741ae73232b0a5f10b2.pdf
    • https://static.usrfiles.com/ugd/26481d_d92e8ce030434777bd28f2cc2f882c1f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006013.bin
9f9b4b602311c45270189cb200e3148be65f88044db47692725719a033a52881
pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 5456 bytes
font_01_sfnt_off00007291.bin
9a493e7025d82dc927c3d01dba243200fc006cf04eba34632abd9e1fdf978b85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 10680 bytes