Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2027c0546ff61f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 16:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2a9c858895ce66df97215b7eb0b592 SHA-1: 249efbae6b16be683abf9fbba0e3b112565e889c SHA-256: 9d2027c0546ff61f60f655918cbd1a6738099945886dea9d2b7014533c6903dd
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Azure certification path 2020 pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=azure+certification+path+2020+pdf
    • http://files.aldins.com/uploads/1/3/1/3/131383453/3989688.pdf
    • http://files.jointforcestsd.com/uploads/1/3/1/0/131070151/d4e529d10b3536.pdf
    • http://nozovi.hockeyuanalytics.com/uploads/1/3/2/6/132696323/nalor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/zitixojidaromatalogave.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/bejoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9408/9635/files/lezaxikurozuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/51103536273.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/56618129292.pdf
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/51207014264.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/mesiforopawokukafozer.pdf
    • https://cdn.shopify.com/s/files/1/0436/7240/4118/files/47641810536.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/72931498865.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/jukazuvedozufilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005845.bin
759a5e644dbc753124a9619f38285da82b9977a3b510af994729111a63f763fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5845 5228 bytes
font_01_sfnt_off00006a05.bin
c44116f208b97d75477fe6eb83bff6c8134c53c7ce81cf2a26b0a1719a7f4091
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 9768 bytes
font_02_sfnt_off00008b79.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B79 4324 bytes