Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c9b57a4f7b585c…

MALICIOUS

PDF

62.5 KB Created: 2020-08-10 03:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d45c4c04eb05e699275dec41ce3102fb SHA-1: 051c52479e9171f27e9d1e824dbc5d4e7c00ded2 SHA-256: c1c9b57a4f7b585c3bec475b452bc261b966608b9c265954e7a8922d52d24296
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking Shopify URLs, likely to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=batman+under+the+red+hood+script+pdf
    • http://files.amyplouff.com/uploads/1/3/1/4/131437532/5857048.pdf
    • http://gigetepet.kiddiesloungenursery.com/uploads/1/3/1/4/131406717/cdf9e43c.pdf
    • http://files.vytalmovement.org/uploads/1/3/1/8/131871535/mutogusafodofu-manikinotixumuk-refonutamerirel-takoveri.pdf
    • http://files.nseldercollege.org/uploads/1/3/1/4/131453989/983f2.pdf
    • http://ralen.lincolnperformingarts.com/uploads/1/3/1/4/131453540/cf4b5432deb.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/febovevimupuboripurin.pdf
    • https://cdn.shopify.com/s/files/1/0441/2473/3592/files/31948706384.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/47951162907.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/kidney_function_test_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/84968513394.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/kezujawunoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6409/files/xapawagonerivisusi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/bloxorz_level_33.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/41718051036.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/ajax_toolkit_tutorial_asp._net.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/nazesuwijonepokasitalag.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/27885383657.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/vezimux.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_off0000b6bb.bin
dad1fb87b0fb570c8aa631c306676bfc90a6ea47fc79f8516ddd6c046de4e4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BB 5412 bytes
font_01_sfnt_off0000c8fb.bin
2a9c83362921d4f9118689384317b7776f37813f2cef05a8289d9a0022313461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 10316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.