Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc4f33a3b2d41b2…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 08:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aab909d3dd343e2d9d810a1227120dd SHA-1: 81721baadbdbc9819e58579bc53e6ac7d64e1954 SHA-256: adc4f33a3b2d41b2ea35f9ed88974667256db1481b07394efc1302ff5b620508
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects through ttraff.com, a known malicious redirector, and is presented with a keyword suggesting a lure for 'instagram apk'. The document body, though heavily obfuscated, also contains this URL, indicating the intent is to drive traffic to malicious or potentially unwanted 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=instagram+apk+apk4fun
    • http://files.therisingcafe.com/uploads/1/3/1/4/131437977/46fdddfe0f883.pdf
    • http://budivoj.donnaliberalistore.com/uploads/1/3/0/7/130739963/faae26f1458b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/jakim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/5958857338.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/microsoft_office_2019_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/betfair_sportsbook_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/51748514076.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/zabefevavudixatudizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/ata_thyroid_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/fizas.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/mufilemafivisowopukerom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/speaking_english_file_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_off00006e8b.bin
f2eb9f4e5ba2b9cb34afbbb06a4e8969002d4de5138c02a5039488f4178b85b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 5276 bytes
font_01_sfnt_off0000806e.bin
ff34cca0c9ced492f040f8375c552b4daf7eba155adc72908c479d079b57c474		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806E 10688 bytes

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