Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a17225783b13d13…

MALICIOUS

PDF

46.6 KB Created: 2020-08-24 10:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 466896fe1d4c460630362dd5a25c601e SHA-1: 5aa2197113f22ae1c38079ba9d5499869df05da8 SHA-256: 1a17225783b13d13fc018fb40175c1a6b7c6189ce2762b14145ec81d8000043d
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body and heuristics indicate a lure related to 'backup app android su pc', suggesting a social engineering attempt to trick the user into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, points to a link farm strategy, likely for SEO poisoning or to distribute malicious content.

Heuristics 3

  • 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.
  • 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=backup+app+android+su+pc
    • http://juwabuve.writtenapocalypse.com/uploads/1/3/0/8/130874482/lolulew-lufegigumogo-wudesowozuwe.pdf
    • http://tiguluju.nextbillionventures.com/uploads/1/3/1/3/131384609/4740784.pdf
    • http://zufotiro.sayyestothecake.ca/uploads/1/3/1/4/131437812/274e0.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/agnes_grey_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/callan_method_book_5_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/11142460930.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/towosoxorekufuxasaxivat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/suxeguf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/free_online_language_translation.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/directivity_and_gain_of_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/80073399147.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/blacksad_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/sunupudisus.pdf
    • https://cdn.shopify.com/s/files/1/0462/3033/9735/files/delete_browsing_history_in_google_chrome_android.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_off00007954.bin
215971517558fc2e3854b3ec29f24388ff9b960529c8315f5f09c44a3588cd89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7954 5148 bytes
font_01_sfnt_off00008add.bin
c5c3d1ccca8cc7c2253a8a0c6ba57a83d0f78478900d1f48f6a214718affcb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADD 10196 bytes

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