Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50ed4da607404bf…

MALICIOUS

PDF

51.6 KB Created: 2020-08-25 20:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d58c79bfa005a333c86e68a9051ad8e9 SHA-1: 8caa064be98e195f7875b300fef403726a1bc7b6 SHA-256: d50ed4da607404bf73c70132e5cf9470fd95e2346c69a0a03890e2b954dfc16d
140 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF files hosted on Shopify. The presence of a QR code lure further suggests a phishing or social engineering attempt to redirect the user to malicious infrastructure.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=format+factory+portable+fran%25C3%25A7ais
    • http://files.bonezsoft.com/uploads/1/3/2/6/132695546/galav_vawesus.pdf
    • https://cdn.shopify.com/s/files/1/0459/2658/0375/files/7030113765.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/double_comparatives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/zulagozuvatedatenifuzazuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/jepujajefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/liste_des_adjectifs_numraux_cardinaux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5441/5515/files/32216851217.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/kesulitan_belajar_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/13467298241.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/pedaxepowuzop.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/gegugevanaki.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/jopodedafatuvowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/najukiwowixozuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/frozen_let_it_go_lyrics_download.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_off0000887f.bin
555efd285c495a0c7c6939c26fbd6af59d2c7c189f5c1b6a2a1d8ee10cb007f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887F 5540 bytes
font_01_sfnt_off00009b01.bin
234b3d4e2d857fa926ac6a406bdfd782e52ee122576d565bfdba8bd6db4c5169		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B01 10764 bytes

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