Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c85f3fa247efa1…

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 16:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee5e088b1d9e65b1899dc898c9096b86 SHA-1: 39eaedaa969cf633926bca49fc88b9076a42b674 SHA-256: 06c85f3fa247efa1b15cf7d24a23aaa0fc16bb5048382b114131a40474c8a8b0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which is a common tactic for distributing malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a search query. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection scheme.

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/pify?keyword=corded+telephones+with+answer+machine+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/374ce0_c6a716e78aae4d6980fde9c57407aa49.pdf
    • https://static.usrfiles.com/ugd/b8c837_770ea67dbfeb46729b6744aec996c398.pdf
    • https://static.usrfiles.com/ugd/b8c837_e92078842fa141ccbf09640afcee7c59.pdf
    • https://static.usrfiles.com/ugd/3aee12_a5d75cdbd67c4a57abd1837e5e09c3d9.pdf
    • https://static.usrfiles.com/ugd/9c43ec_8d1e9bae2cbb4051a71678cd6d2cf1fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_affdca35539d4e3f84b75cf182a391b1.pdf
    • https://static.usrfiles.com/ugd/909b15_3548c1444bb747f58a5e6eb30af37c13.pdf
    • https://static.usrfiles.com/ugd/b88e3d_c297503cb8d84d5e978c7cbf0febda1e.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/konubujapozopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/cinema_box_for_android_tv_box.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/xisufuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/agricultural_science_grade_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/nasisukamazugazoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/17837559835.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_off00007cb5.bin
3e8d5c7b9069f73f6e6f4b833e49fd17cfb7085a9815215f3e60ba1d92078e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB5 5376 bytes
font_01_sfnt_off00008ed6.bin
641d841706cfaace87777b3a91747356caf6d6e75b116324f9c17cbc0dd24121
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED6 10332 bytes