Malicious PDF — malware analysis report

Static analysis result for SHA-256 3894c733ea944e45…

MALICIOUS

PDF

51.3 KB Created: 2020-08-21 02:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac3451db2a282093220c10b13b5a3bd4 SHA-1: a2dfffb83924873ebc524a82816b017a51b2dc4f SHA-256: 3894c733ea944e4587a80653c7ce9a869cd6bde305d8e83ddeed51044786df10
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as a guide for an online game. This indicates a social engineering lure to direct users to malicious infrastructure. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for the malicious content. No scripts were extracted, but the primary malicious action is the redirection via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=discord+epic+rpg+guide
    • http://files.competz.org/uploads/1/3/0/7/130738572/fbb34d141.pdf
    • http://files.grapevineoasis.com/uploads/1/3/1/8/131856158/magabuzexosazug-xixutovo-zojozum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/rockwell_diff_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/sepafaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/ctet_exam_date_2019_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/49724690750.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/44175556027.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/85487874720.pdf
    • https://cdn.shopify.com/s/files/1/0432/3619/6507/files/poxebozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4982/files/66843991658.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/deragenufufefexega.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/57178940154.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/rapirosimajizupudipu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000759a.bin
e2fa51e15b921cad0a9b98417f4fb3c862ba45e782797039d4e3b98694136d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759A 5000 bytes
font_01_sfnt_off000086a8.bin
92da481701c8c342bbc05f429c260f727cf3c690b90d418b4f588c0f83696b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 10580 bytes
font_02_sfnt_off0000ab0d.bin
0e79eea43f1f692bae4a12691b1eac886fb7de2d803852ebca7e9d020a94210a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0D 16144 bytes

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