Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c01116d50e51d42…

MALICIOUS

PDF

40.5 KB Created: 2020-08-03 23:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6726655ce36d119df50a94eb8770f9 SHA-1: 70cb04f8f578dcc1980809caf95a41983b8f7661 SHA-256: 2c01116d50e51d42f6a3112ec3ef926113206f91ecb0db536a2c0464281733f7
152 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=aims+and+objectives+of+cooking+food+pdf' is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The ML classifier also strongly indicated maliciousness.

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=aims+and+objectives+of+cooking+food+pdf
    • http://files.passion4healing.club/uploads/1/3/1/6/131637649/buparadusokir.pdf
    • http://files.emmanuellezeesman.com/uploads/1/3/1/1/131164431/e99d8faf18b59.pdf
    • http://files.miapark.com/uploads/1/3/1/3/131397960/nofiliroxipafodox.pdf
    • http://files.commongroundonthehill.org/uploads/1/3/1/6/131637055/gonexibifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96328102714.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/nabenawusupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/almidon_en_coprologico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/68540185620.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/93910496809.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/39226812317.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/minukojejipimezux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/github_readme_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/kedutediredebuwij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/bujuzojinutifeg.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a4.bin
01e66db8bd524707decf3109890cc54f626fa19bed0fe12e6ee70aa7fcb2db4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 5676 bytes
font_01_sfnt_off000073f6.bin
7b33cec578265d53f10fbe6be62c6abc577f97a6d102d81548037176f26485e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 9772 bytes