Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadd75d2a2686f47…

MALICIOUS

PDF

47.8 KB Created: 2020-08-06 05:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b6eec0e3fa37700d3acc030ec4c3be SHA-1: e1bf3a6685aae3b6ff0cfded6f688b3b698e38d7 SHA-256: aadd75d2a2686f47d7d5599aad180c2fbcbec2c20d9bc3bb7be9e7051f64c5b8
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=boilie+rezepte+pdf'. Additionally, the document exhibits characteristics of a PDF SEO link farm, with many links pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search results or distribute content through a seemingly benign platform. The presence of these links, particularly the redirector, indicates a likely intent to lure users to malicious or phishing sites.

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=boilie+rezepte+pdf
    • http://falosum.7ironclassic.com/uploads/1/3/2/8/132815367/3659649.pdf
    • http://files.aperitivoperformancegroup.net/uploads/1/3/1/4/131438211/86c3bb.pdf
    • http://momunile.shaynamade.com/uploads/1/3/0/8/130874304/mewitew.pdf
    • http://milura.narnargoonfc.com/uploads/1/3/2/7/132740494/zemilugepukit_kupajumevelus_rejuka_rulidobax.pdf
    • http://zusemutuv.pupchella.com/uploads/1/3/0/8/130813765/sibideromapas-dixiwakejetax-xokowinizovax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/the_analysis_of_biological_data.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/grove_manlift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/52536301525.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/41971805658.pdf
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/clep_microeconomics_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/69654588898.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/jabagewilinawasajewebat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/80531794935.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/37942841088.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_off00006d95.bin
99304bb9738827e1bb4bfcd71ed461b271b0eab54a5130945496dac84214a077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 4428 bytes
font_01_sfnt_off00007cb9.bin
4523362670a83db0db7f5ae7c1c1b3d5f7f7915ec185b8cb19a46600c4e93169		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 11800 bytes
font_02_sfnt_off0000a2f9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F9 4324 bytes

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