Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b134b5e143a01b8…

MALICIOUS

PDF

51.2 KB Created: 2020-08-12 20:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ac701e66257f0ab20bc521da464a17 SHA-1: 22ceae608b61448aebd777f643e9b450326f4dd1 SHA-256: 4b134b5e143a01b83a7d1d21551987d3b65f5cd0ce3941ccba5753fc9271f37f
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=catalina+island+birthday+pdf, which is likely used to redirect users to further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=catalina+island+birthday+pdf
    • http://files.regencyparkcary.com/uploads/1/3/1/4/131454270/8102637.pdf
    • http://rojofigag.lakesideassembly.net/uploads/1/3/1/3/131383629/e1983a862.pdf
    • http://files.medium-shelleyjones.com/uploads/1/3/0/7/130775071/8c9b82a1be7.pdf
    • http://files.mckayapartments.com/uploads/1/3/1/6/131637240/tepizujulofekijefa.pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18813115042.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/glass_bottle_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0453/1814/4155/files/nuwowiwigugimavupika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/8d_problem_solving.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/3013384763.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/conjunction_exercise_for_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/difference_between_memorandum_and_articles_of_association.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/legal_service_authority_act_1987_bare_act.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/nizepipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/14607341293.pdf
    • https://cdn.shopify.com/s/files/1/0435/4267/5608/files/force_and_destiny_character_generator.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_off00007c1a.bin
1fb50d137596f6b609f06241b5ffbb4f153645933f8f204be1a94977634a9529
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1A 4956 bytes
font_01_sfnt_off00008cd8.bin
277340699fea4398bed2bb99cb9f666d75761b094004471d4192a6463d7c4e56
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 10652 bytes
font_02_sfnt_off0000b12a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB12A 4324 bytes