Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ef28a02f546408…

MALICIOUS

PDF

43.2 KB Created: 2020-08-13 23:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb2b7baf3898318d2132b59e5b3e123 SHA-1: 2fa35b5608e6b2a28315536a743986016f898738 SHA-256: 48ef28a02f546408619ddcdbd2fbc8b6b7d7f48e438b3fb3d7721d88d434f784
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=emulator+for+android+playstation+2'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm strategy to improve SEO and distribute the malicious payload. The ML classifier also 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.cc/pify?keyword=emulator+for+android+playstation+2
    • http://files.lthbconsulting.com/uploads/1/3/2/7/132712268/8880686.pdf
    • http://nugazadi.yiukwongchung.com/uploads/1/3/0/9/130969916/nukedubaxuxetejeten.pdf
    • http://files.wearecvsta.net/uploads/1/3/0/7/130776592/01f7a7.pdf
    • http://files.matthewjohnsonpainting.com/uploads/1/3/1/6/131637419/3a62051.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/appendicitis_akut_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/26840124245.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/absite_review_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/59325410645.pdf
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/download_youtube_videos_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/acupuncture_treatment_points_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/coronary_sinus_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/wezelizepupimox.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/22357771717.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/gopobavojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/vezulatomiregato.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/cage_framework.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/sapeji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/55036723598.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_off0000691f.bin
1a73099f3a9813a6c8762f7f7d11361bd60deaad90d23cf9b719d76ea68cbe24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691F 5380 bytes
font_01_sfnt_off00007b5f.bin
940800e3e1dd0b83878f1184817f0017b2166903713c844da55d6bf163a1c460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 10636 bytes

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