Malicious PDF — malware analysis report

Static analysis result for SHA-256 8def57dcb5d30e68…

MALICIOUS

PDF

40.5 KB Created: 2020-08-15 20:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 489d7455bb8a2baab2c2bc310cb0c5de SHA-1: 0a7ef306bfdc9a17d0cf415ae1277b46a38b5004 SHA-256: 8def57dcb5d30e683908b7c59414e353ebc20f34751d1270136bb6a1cb352402
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 external PDF files hosted on Shopify. The primary malicious link, https://ttraff.cc/wb?keyword=respironics%20cpap%20machine%20user%20manual, is identified as a malicious redirector. The document body, though partially corrupted, includes text related to a 'respironics cpap machine user manual', suggesting a lure to disguise the malicious intent. The presence of numerous links and a malicious redirector indicates a phishing or scam attempt.

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.cc/wb?keyword=respironics%20cpap%20machine%20user%20manual
    • http://files.ps128m.org/uploads/1/3/0/9/130969654/4931345.pdf
    • http://vowegased.moysmovies.com/uploads/1/3/1/8/131856772/fajigibalu.pdf
    • http://files.andyknappmusic.com/uploads/1/3/0/9/130969954/basuk_fidajuxe_najabalidigexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/42154489281.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/vewapukozudamugapofanibeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/43246093078.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/74662378065.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/67574328010.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/41716301418.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2491/files/abdominal_perineal_resection.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/how_to_be_a_good_writer_and_speaker.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/54773257483.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_off00006182.bin
a819ab007e25294bc58047e9647b24fb7e3b34bb9663df74e630451716f0394c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5180 bytes
font_01_sfnt_off000072f3.bin
ab2e6f21de19c0c8a3823da9af4b6234893137466da3cc7d74a5f41b550b5102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F3 10096 bytes

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