Malicious PDF — malware analysis report

Static analysis result for SHA-256 caeb69718150bf0f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 16:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350dff961525a16b4429fe3b6b69bb9a SHA-1: 6eb2a0061d194cab6dc98ac746a41e5d4ff67542 SHA-256: caeb69718150bf0fdf12a50964eaaa55d3f81d2544186891a19c3e91b73deadb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users to potentially malicious content disguised as software downloads. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=archero+mod+apk+1.+2+2
    • http://files.tofugraffiti.com/uploads/1/3/1/4/131438203/gutoponurivaxu.pdf
    • http://files.portogether.com/uploads/1/3/1/4/131406498/f7831b9b02.pdf
    • http://files.marshallcoauburnclub.com/uploads/1/3/1/3/131398084/7669568.pdf
    • http://files.godleyband.com/uploads/1/3/1/4/131453998/lizenewuxin_momutipojan.pdf
    • http://files.vocations-sagesse.org/uploads/1/3/1/6/131606755/a4c5f.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/2018_vw_atlas_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/cricket_world_cup_final_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/12772382844.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/pia_vpn_adblock_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/fekuguwisakanu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/blackberry_10_os_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/excel_multiple_regression_analysis_and_forecasting_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/64306484301.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/ncert_class_12_accountancy_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/27251292813.pdf
    • https://cdn.shopify.com/s/files/1/0437/4141/3527/files/48849660396.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/ziwajusejapipamidebagas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/61027557255.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/arpeggios_rhythms_and_scales.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_off00006495.bin
5ac646552b4314c2ceba44b588750a72a294eed80747cdeac4dee2b1c642b445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5372 bytes
font_01_sfnt_off000076b7.bin
1fd276ef0c84f5b776ef73456f5f9562449dd8a6f6733ab507dcf3f835056d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 10024 bytes

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