Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5b815b977b6ba9…

MALICIOUS

PDF

45.0 KB Created: 2020-08-18 21:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cdfdf0a4e3cef1f1c0c92032838b6ce SHA-1: 896f1e005c256a3b3857e753c4d92082e87dca2b SHA-256: 3d5b815b977b6ba942bd5a69cbad3554ace82bdeea82ecabde800baed6ef6d82
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The document body contains the URL https://ttraff.cc/pify?keyword=genetics+questions+worksheet, which is likely used to obscure the final malicious destination. The presence of numerous embedded URLs, many pointing to Shopify domains, suggests an attempt to distribute malicious content through a seemingly legitimate platform.

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.cc/pify?keyword=genetics+questions+worksheet
    • http://files.zejmusic.com/uploads/1/3/1/0/131070934/31feb590b.pdf
    • http://files.viptowingcorp.com/uploads/1/3/0/8/130874118/morekigagigobid_numajimipuwoze.pdf
    • http://files.millerpac.com/uploads/1/3/1/6/131637255/e713f0f951c.pdf
    • http://kazup.doortodoorandmore.com/uploads/1/3/1/3/131378776/7e98f96c7270a0.pdf
    • http://bakuri.philosophiesofeastandwest.org/uploads/1/3/2/6/132680813/133311.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/descargar_50_sombras_mas_oscuras_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/82921455205.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/guzapibenuberipil.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/ripoxuzufetavemumawubali.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/free_weekly_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/banenenisurup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/amazing_grace_sheet_music_f_major.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/kikijitopo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/bluestacks_3_for_pc_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/16472342113.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/learn_bisaya_language.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/add_google_font_to_stylesheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/angielski_w_tumaczeniach._sytuacje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/jibozafudofaw.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_off0000654c.bin
b0a0a1c1e18cd0b16b011f4b711fe04402901fdf75b576ba58942876c0f7908e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 4840 bytes
font_01_sfnt_off000075db.bin
15f29cb2abcd14d735ae4f5e11cc9787cedc0ff57400bf8908478d6cf1b4ec70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 10132 bytes
font_02_sfnt_off00009892.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9892 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.