Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee675239336d1916…

MALICIOUS

PDF

40.9 KB Created: 2020-07-23 02:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 41378af70909f9e44c82029023b72573 SHA-1: 35c42e7c120260aebf018311a535db7a3e76d606 SHA-256: ee675239336d191637c0c012b0db659dc4f9bdbc2f8679a85f8bbb73bee334c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. The document body, though heavily obfuscated, suggests a lure related to educational materials ('Teacher's book new headway elementary third edition pdf'). The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site or download further payloads.

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=teacher In PDF document text
    • http://files.lifesabundancecoaching.com/uploads/1/3/1/4/131407465/1686095.pdfIn PDF document text
    • http://files.sweetpsdecor.com/uploads/1/3/1/4/131410736/9d405314dd50e.pdfIn PDF document text
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdfIn PDF document text
    • http://files.staceylynnsworkshop.com/uploads/1/3/1/4/131437530/vuxibanojifasi_zutaf_tiwexuferom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1060/4705/files/61111609695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/gopodazadozegomisurafuvaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6701/5335/files/pobebatavitiliwaxolowobiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/lapirimujadotelimopuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/66393194156.pdfIn PDF document text
    • https://basopejimip.files.wordpress.com/2020/07/49267734208.pdfIn PDF document text
    • https://wesobitid.files.wordpress.com/2020/06/buketatunudosususasat.pdfIn PDF document text
    • https://wubegupo.files.wordpress.com/2020/06/51802595439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/mufagasidunenaxuxuzujovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/30805071075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/39062990941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/zagigowejaruwemureguved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/60491884771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/luzogomawanopuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/tesigudire.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F94 5564 bytes
SHA-256: ea14d9352f5ba52b544a8830ca8037957273527a1b26936c09431980b4c69c43
font_01_sfnt_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10352 bytes
SHA-256: 958e300d40ce753f7e5741a309187824bc695fc0ff7b533bce81642852bf6ab4

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