Malicious PDF — malware analysis report

Static analysis result for SHA-256 b889634e45e2ca02…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 13:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8d1e3f67f4e2bc142d04b05f2b5b64 SHA-1: 2edf18b44834e69d63849737e0c4e160e0078f8b SHA-256: b889634e45e2ca0201ee0e7937f3991743b999ae9f1e7e466c4679c9fb95650f
128 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action to convert a file online, which is a common lure for phishing or malware delivery. The embedded link directs to a known malicious redirector, which then likely leads to a malicious payload. The PDF also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm used for SEO poisoning or to obscure the final malicious destination.

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.ru/pify?keyword=chuy%25E1%25BB%2583n+file+pdf+sang+excel+online
    • http://files.mtsarmusic.com/uploads/1/3/1/3/131379409/gufuzi-xosizavono-pitetesezavok-wegupipiri.pdf
    • http://files.dbssstingsoccer.com/uploads/1/3/0/8/130874493/besaxalajep.pdf
    • http://files.eric-goodman.com/uploads/1/3/1/8/131857213/5880873.pdf
    • http://files.tiarasandfeatherdusters.com/uploads/1/3/0/7/130739789/bikej.pdf
    • http://files.fatherheartcanada.com/uploads/1/3/1/6/131637072/nemijedimupozojiviw.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/butigawukukemanela.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/pefuravofanolojebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/maladolescenza_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/pekokavagogexoxawemaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/47370854021.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/39567052574.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/51337908235.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/catecismo_de_la_iglesia_catolica_para_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3293/files/4250823420.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/kth_smallest_element_in_two_sorted_arrays.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/74422869534.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/medical_tourism_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/70916175764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/famuvibovefisutaredukoza.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_off00006378.bin
71cdd4cf3128cc16045da9c24c5ce84f9ca6e0527404e35f6b0692a767693f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 5604 bytes
font_01_sfnt_off00007660.bin
04e4231707fdb7c8f2f53296518de6b9a121fe4d26ed18dbde322ae8c69b561c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 11344 bytes

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