Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b70cd953ebffc3…

MALICIOUS

PDF

39.4 KB Created: 2020-09-08 22:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5855920d9c69238a5eb7334b801c18b SHA-1: 55ecc328823e52967fbdc230d5479c3c6d1817c7 SHA-256: 89b70cd953ebffc3c675e5461840b8539b16fee7314fea188b1dccffd66e81de
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains the malicious URL and numerous other embedded links, suggesting a link farm designed to distribute malware or conduct phishing. The primary malicious URL identified is https://ttraff.me/wix?keyword=completed+pico+worksheet.

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.me/wix?keyword=completed+pico+worksheet
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/english_dictionary_with_marathi_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/49443391508.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/30077789719.pdf
    • https://static.usrfiles.com/ugd/c3548c_07b872b72cf746ca97b61dc520d046ee.pdf
    • https://static.usrfiles.com/ugd/4fea5c_76ad9fbc50944ebcb96836d46ab8e7f9.pdf
    • https://static.usrfiles.com/ugd/9d869b_f6b3d73a25584719b848301206223d84.pdf
    • https://static.usrfiles.com/ugd/3fd21f_747cf62329ca48c79f66d04ea1f405c0.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0278/files/gafudafakit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/8638199050.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/bidesiya_bhojpuri_all_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/4303/5048/files/bumela.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/97379607661.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/ferijaxugizudiw.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_off00005dcb.bin
ec30cbc8a9d3260e179d1bfc937837f215407d60f63433c2db413788ee9d2f3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 5164 bytes
font_01_sfnt_off00006f3f.bin
098e203d1250f36dbc0be514672424b18b4276bc6ebc1015bcb78a11b2326c96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 9908 bytes