Malicious PDF — malware analysis report

Static analysis result for SHA-256 3315b02b356638ea…

MALICIOUS

PDF

73.6 KB Created: 2020-08-11 17:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c513cfa2ce13307b0eb0def7d7d011e9 SHA-1: 6177b2c866f473b9ffc50b0cef101fb2dc358bb5 SHA-256: 3315b02b356638ea2457983509e67aff0383fa7de116c588c58553adbcbbe24c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body itself is heavily obfuscated but contains the same malicious URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious content. No scripts were extracted, limiting the analysis of further payload delivery or persistence mechanisms.

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=teorema+binomial+newton+pdf
    • http://files.cristinaaucone.com/uploads/1/3/1/3/131378835/simizipodotifub-xokikij-moresoto.pdf
    • http://files.kftstudio.com/uploads/1/3/1/3/131384424/kuzaz_nuranaje_wapirujuk.pdf
    • http://files.vanvliet-kassenbouw.nl/uploads/1/3/1/4/131483097/mosozojejo_zazeletexo.pdf
    • http://files.alaskaseakayaking.org/uploads/1/3/0/7/130776022/6777858.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/29402407207.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/kuseritizofufonovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/lutasazezowufoxuxuvaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/85259529156.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/advanced_articles_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/51130377676.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/roremizulajaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/jebojuxunokujogij.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/59224587430.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9445/files/36521540401.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_off0000bdce.bin
d5435995354f6847d4ee43a62a43cd01fe62faec56b164ee341b352a3aa7e586
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCE 5188 bytes
font_01_sfnt_off0000cf67.bin
c0d11d556d698a1f04e1119de69be8dec4c3135cbf2f63d7a40ac012e9d38405
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 16300 bytes
font_02_sfnt_off000102b3.bin
f940c844c00eb02b001ed5499b7dd8be50631201eee9e1fd44cea8a5f6426f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 16380 bytes