Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7277fb5e468b6e…

MALICIOUS

PDF

44.8 KB Created: 2020-08-15 19:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51cd20b2f4251c907977d50f3dcaa0b7 SHA-1: ab7ca79320af0bf8f1f2218ea0cd369797a33882 SHA-256: 5b7277fb5e468b6eb0910fbf328021e544a21f7fa44715d9db0c5ee5c94bfae5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, but one critical link redirects to `https://ttraff.cc/wb?keyword=zoltan%20dienes%20understanding%20psychology%20as%20a%20science%20pdf`. This redirector is flagged as malicious. The document body, though heavily obfuscated, contains the same redirect URL, suggesting an attempt to disguise malicious activity as a legitimate document. No scripts were extracted, but the presence of a malicious redirector indicates a likely phishing or malware distribution attempt.

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/wb?keyword=zoltan%20dienes%20understanding%20psychology%20as%20a%20science%20pdf
    • http://files.anonymityfilms.com/uploads/1/3/0/7/130775939/meripidupini.pdf
    • http://votalodo.childrenscoalition.org/uploads/1/3/2/6/132682156/jekivovoparuv_wikub_fakixuzur_dobuz.pdf
    • http://files.telezapper.com/uploads/1/3/1/4/131483138/7472415.pdf
    • http://gunamul.randomtraveler.net/uploads/1/3/0/9/130969723/jewoturujaneteja.pdf
    • http://files.pfed.org.pl/uploads/1/3/0/7/130775125/dizawusaxosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/ecology_lab_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/understanding_culture_society_and_politics_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2593/files/comparative_adjectives_and_adverbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/phantomjs_print_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/kenmore_sewing_machine_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/ratetotawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/zufidotonakasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1112/files/app_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0454/9050/3832/files/soda_license_key_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/application_software_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006356.bin
ed0cad8875fe1171280b0aeca6f30d34a874141c2b05d722a9a72093a4f6cc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 5360 bytes
font_01_sfnt_off0000758d.bin
87257fc0aaecb1cb9a335179f6afc7c42d2d898456ee513fedac24f86098c09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 9948 bytes
font_02_sfnt_off000097a2.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A2 4324 bytes

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