Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ab23634ce1428d…

MALICIOUS

PDF

48.6 KB Created: 2020-08-15 07:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2258023129eac25081a1dfba1c3b271b SHA-1: 0a051e20824116e507a46fd796fcdd2c06b26c4a SHA-256: f7ab23634ce1428d80224796a9b1e2313d706b3be0abc8c07fb5a82c92482add
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, includes a URL that is also present in the heuristics as a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to obscure the ultimate destination or to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=acog+guidelines+for+thrombophilia+in+pregnancy
    • http://pibosig.adkcoastcultural.org/uploads/1/3/2/3/132303382/20640.pdf
    • http://files.roughsawnlumber.com/uploads/1/3/1/1/131164252/laxuf_ropopoferegoz_sumokidisimusug_jorizujagika.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/44417467724.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1413/files/74009710076.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/batch_convert_files_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/19647198300.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/vogitalozebopiruxapav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/target_cashier_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/88269517672.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/87931150394.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/memories_on_tv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/76230548902.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/assistive_devices_for_visually_impaired.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/libro_actos_de_fe_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/mapovowamibomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/jonalavaredotimudam.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/
    • https://cdn.shopify.com/s/files/1/0431/7505/1413/files/7400

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007be3.bin
1bd1e15e72eb967362f545d3161852509712247861c75ffd9946c12e1a8c2b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE3 5800 bytes
font_01_sfnt_off00008f76.bin
791fcedc80be4bb23d8980b438e2d7b451bd236d71ce2dee66bd60f770b9d1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 10936 bytes

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