Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f813ad7227e930…

MALICIOUS

PDF

51.0 KB Created: 2020-08-20 00:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2eaba0f9f5b75fc2872e18195d23df7 SHA-1: 9fcef03daf89a7e1ea361bcd6578ec98d4948a9b SHA-256: a9f813ad7227e9304d6c8e20f53150beaf1a4df5eeed63c99f8b923ff0b88293
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to a malicious domain, disguised as a 'Scrum burndown chart excel template'. This indicates a social engineering lure to trick users into visiting a potentially harmful site. The presence of a 'download button' heuristic further supports the lure aspect. The PDF also contains a link farm pointing to numerous PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, limiting the analysis of further payload delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=scrum+burndown+chart+excel+template
    • http://files.norunovelties.com/uploads/1/3/1/3/131382470/zexinijuvibozupu.pdf
    • http://files.pureloveandlightcentre.com/uploads/1/3/2/7/132712011/f1d2c3ed256dfea.pdf
    • http://files.dumbingdownamerica.net/uploads/1/3/1/4/131437604/tefelupefa.pdf
    • http://files.treschicshopper.com/uploads/1/3/1/3/131383586/3322757.pdf
    • http://files.iamhanqin.com/uploads/1/3/2/6/132681617/2777218.pdf
    • https://cdn.shopify.com/s/files/1/0430/4050/6009/files/miwifub.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/90391532029.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/zegakigulopajebeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/6th_grade_spelling_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/garemoporegarisetiwikami.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/58771054686.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/rforme_fiscale_luxembourg_2017_calculatrice.pdf
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/breaking_into_wall_street_dcf.pdf
    • https://cdn.shopify.com/s/files/1/0447/1390/2234/files/bella_s_lullaby_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/add_png_to_document.pdf
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/kevesukapepalesavudexu.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_off00007b6d.bin
3fe1088716f11cbc9c84672dd7e032818de49739f2c7556187921672d91b75f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 5372 bytes
font_01_sfnt_off00008d8b.bin
c091b42d2a410ebd03e974ff322668b9d0ee2d08a64c4a57447704ba9b3801b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 10300 bytes
font_02_sfnt_off0000b076.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB076 4324 bytes

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