Malicious PDF — malware analysis report

Static analysis result for SHA-256 605e5447a5bf7789…

MALICIOUS

PDF

64.5 KB Created: 2020-08-26 00:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa987db2f09d911ded9dbd07b502941a SHA-1: 92bc1783a3b47ab323a4e5fe6522d662d6d7bfc8 SHA-256: 605e5447a5bf7789d5b61789d62e6bc0fcc76917a6cdf23426d3703970757b46
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The presence of many external PDF links suggests a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.me/pify?keyword=graficas+isocuantas+e+isocostos
    • http://files.titanguitars.com/uploads/1/3/1/6/131606874/5755983.pdf
    • http://tudul.nocofoodincubator.com/uploads/1/3/0/8/130814855/milelitopolow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2877/4044/files/wuxewule.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2928/files/euphorbia_stellata.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/malenane.pdf
    • https://cdn.shopify.com/s/files/1/0458/2745/7187/files/bugs_bunny_movies_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/13603101670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/kijutagunisore.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/81530391861.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/gixulopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/terolezujoginozivikolumij.pdf
    • https://cdn.shopify.com/s/files/1/0429/4996/8035/files/mulan_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/padajabudozuzuvimof.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_off0000b11e.bin
a5c75591afe1d6ec0c3ece1123c83442b11692f38a2d3f99146a4aed4d51c583		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB11E 4756 bytes
font_01_sfnt_off0000c157.bin
eb96435db00026ce557069865b253ee703b9c9d784cb60feec73439330208180		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC157 11300 bytes
font_02_sfnt_off0000e771.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 4324 bytes

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