Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9a34657610d106…

MALICIOUS

PDF

43.8 KB Created: 2020-08-07 19:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ec397f5896b5304262c07b5ce444c5 SHA-1: 97de173ffdf9648832184c18a5a347377b7783f9 SHA-256: 6e9a34657610d1060ff1ee49323f50a1a27cf9d37675dc8f5319a760d3d815fc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a malicious intent to lead users to harmful sites. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector.

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=allan+kardec+espiritismo+pdf
    • http://files.molliedouthit.com/uploads/1/3/0/7/130776500/dobowukoko_busitonogoruruw_dixosedo_tezazixesi.pdf
    • http://files.vcubeconstructions.com/uploads/1/3/2/6/132695663/7d5cf12c9a8fa.pdf
    • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdf
    • http://files.lynn-gustafson.com/uploads/1/3/0/8/130874370/070aca6029fd3a.pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/vexisufurulux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/vuzotososojilumovuvunibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/xopuketaluratebowapikaf.pdf
    • https://cdn.shopify.com/s/files/1/0446/7628/4569/files/anandamela_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/saxenemoxelope.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/57174812172.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/75572503659.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/vijapusozejudazawezogagut.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/95518828476.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/rogiwipez.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/nazezirivuloro.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/lirovunidikozenivetanov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/lafofokuzuzenexal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/best_hand_mixer_2016.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_off00006cb2.bin
b240d3779414213c9a329a0bb681428af558f5c43a02cb9ba7f02c902fcd6401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 5356 bytes
font_01_sfnt_off00007ed5.bin
ecbc1f626162f994a3e2b01c0ae401f78056952cc97b6388c2f4ff81da68b670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED5 10640 bytes

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