Malicious PDF — malware analysis report

Static analysis result for SHA-256 582573c21473a868…

MALICIOUS

PDF

41.6 KB Created: 2020-08-11 20:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188b70b165967f687e26ab3bedd88035 SHA-1: c90bb0940d700ba2ad5173d34e671c0412fefdc8 SHA-256: 582573c21473a8684f7f157fe0aa1de087677d90a1230f0ad97eabc1f2bf5201
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link to 'ttraff.com' suggests a redirection to a potentially harmful site, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains the same redirector URL.

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=sap+bpc+on+hana+pdf
    • http://files.walnutcreekumw.org/uploads/1/3/1/6/131607075/5226360.pdf
    • http://files.duenorthdogtraining.com/uploads/1/3/1/3/131380021/fanilaf.pdf
    • http://files.birthyourwaysa.com/uploads/1/3/1/4/131406082/gonuvuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/29653280068.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/betelufubikezuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/14774094478.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/apraxia_of_speech_in_adults.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/34367440770.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/rirovofodolevezovezozija.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/daduwubamiguzemudibadonon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/suwoxogabopudowasumumud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/22931676924.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/luzajimame.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/679735746.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/pokemon_emerald_legend_pokemon.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_off0000636b.bin
79bd8888d2be7080dfc33db8c4cd5ad5ac016bb41a83a495aaa4855cffa8935c
pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 5180 bytes
font_01_sfnt_off000074f6.bin
3911d24e0b912dda541433573aa5b97a49784cb7dc5ca6eca9a3c3fadc6644f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 10152 bytes