Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bac85c2ef0c3ae…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 01:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e0cd5ece56d9e46468605da1a5281e SHA-1: ca4f3b8c9625640d209ee4e10dcb801f7154a549 SHA-256: 62bac85c2ef0c3ae181adda7a72ecbc594dd7c9ef60459b89ad8d2c15509690f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.ru/pify?keyword=boboiboy+galaxy+run+mod+apk+apptoko`. The document body also contains this URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure further supports the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=boboiboy+galaxy+run+mod+apk+apptoko
    • http://files.jackandjamesapiaries.com/uploads/1/3/2/6/132680962/b0bdc6cc62490c.pdf
    • http://taxij.parkcitybrewery.com/uploads/1/3/2/8/132814930/jutikoxukat_viretomesepex.pdf
    • http://files.eftcatherine.com/uploads/1/3/2/6/132680784/dizomigubafotevos.pdf
    • http://vaxajun.trulymedium.com/uploads/1/3/2/3/132302921/7325384.pdf
    • http://puvazexe.spinteesprints.com/uploads/1/3/1/8/131871721/sifemowamil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/career_chart_after_10th_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/inference_deduction_ks2_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/pegukor.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/91327689532.pdf
    • https://cdn.shopify.com/s/files/1/0433/9046/8245/files/84853289157.pdf
    • https://cdn.shopify.com/s/files/1/0465/0359/2094/files/gographie_politique_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/87361214934.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005853.bin
966ac713ef52b904db55503fb9effb23597f264ed500d093b21ee8d426c14978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5853 5524 bytes
font_01_sfnt_off00006b09.bin
ab863f690ebb885fc540c1a46ee1146209667adfdedd8c991a091dc5955a0081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 10236 bytes

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