Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43dce67994785b3…

MALICIOUS

PDF

47.6 KB Created: 2020-08-10 12:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbb3b184922cbaebc4480fdba288b61 SHA-1: f96f00dc771ae8bb55170d9c71ffe97cc6f75f5b SHA-256: b43dce67994785b30bf0000755b06393984ff7cc4c681bc338706178a67bd7d3
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary malicious link, 'https://ttraff.cc/pify?keyword=associate+cloud+engineer+dumps+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect the user to malicious infrastructure under the guise of providing study materials.

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=associate+cloud+engineer+dumps+pdf
    • http://files.thenavigatorprogram.org/uploads/1/3/2/6/132682210/vebil.pdf
    • http://files.trilogystem.com/uploads/1/3/0/9/130969179/teligitikoforu-zigefepigor.pdf
    • http://gesowo.grendonunderwood.org.uk/uploads/1/3/0/8/130814328/a8ecf9496.pdf
    • http://files.catheywebb.com/uploads/1/3/1/6/131606550/9753781.pdf
    • http://voxenivad.svhcva.org/uploads/1/3/1/1/131164250/777e2cc.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6361/files/11530782500.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/beginners_reading_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/technical_analysis_explained_fifth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/the_celestine_prophecy_insights.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/fixosusurimabuvago.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/jolabitalip.pdf
    • https://cdn.shopify.com/s/files/1/0438/2241/6029/files/introduction_to_human_ecology.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/lesaworuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/zituxefodi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/harbor_breeze_ceiling_fan_remote_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/zojobira.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/48735385103.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_off00006a21.bin
33bd210a93b7a8695beb0589bf18c903ed84d96cbf812f4d903caf7447f11b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5344 bytes
font_01_sfnt_off00007c2a.bin
32aecddf34a89ed912dff576470dcea75cb52d1bd1a1f7ed199dc272d904bfc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2A 11436 bytes
font_02_sfnt_off0000a19d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19D 4324 bytes

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