Malicious PDF — malware analysis report

Static analysis result for SHA-256 459bbb7d690d62bd…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 04:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d99d8a03f8681ba93863e8ea37e52361 SHA-1: b28ac6f3325c53e50ab81fbf968258101b665aea SHA-256: 459bbb7d690d62bde4c36d6fa8a536765c6ef759d895eb2f5cbb00c84996c5cb
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body text, though partially corrupted, includes the same URL, suggesting a lure to trick users into clicking it. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a phishing or malware delivery attempt.

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=basic+terminology+of+stock+market+pdf
    • http://files.yhwhourrighteousnesschicago.net/uploads/1/3/0/7/130775646/fatojuviwozit.pdf
    • http://files.missouridefenseforce.com/uploads/1/3/1/1/131164488/fowudenagamowag.pdf
    • http://xujaz.eightpointsafrica.com/uploads/1/3/0/8/130874232/b3fec76b3da7.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/2015_chevy_equinox_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/dunaros.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/42516996784.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/wujisovuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/titewilegonegedupegilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/jipezijexoxuramo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/saparafasabuwuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/gettimeofday_c_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/tupisijijofotedev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/articles_worksheet_for_grade_5.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_off000068a0.bin
7e1a203707ec457aaf49bda5c09053baed10c9d771f8589b833c0f7240056eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 5692 bytes
font_01_sfnt_off00007bf9.bin
e9ca98f903dc3449eb3d21ce57fba13008840801f3c9462491518a128a01a4fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 10304 bytes