Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2f3e0f57b174ab…

MALICIOUS

PDF

41.7 KB Created: 2020-08-27 14:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c60f59537e01dcbb26385e651d8872e SHA-1: e0d49c603042071b07b35a3b92726d96f3502302 SHA-256: 3c2f3e0f57b174abf7baad3f28bf9d7dab67b1bc73a2f5f1b8084d0f4610118b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though partially corrupted, contains text suggesting it is a 'guide' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic further suggests a large number of external links, many hosted on Shopify, which are likely part of a link farm to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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/pify?keyword=musa+awakening+quest+guide
    • http://files.goldenpawsdogs.com/uploads/1/3/0/7/130739892/7331533.pdf
    • http://labunodum.roughsawnlumber.com/uploads/1/3/1/4/131482995/bujubifusekorukamofo.pdf
    • http://xenivizux.nativeturquoisetreasures.net/uploads/1/3/2/6/132683403/lamivo-poruxibak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/98783649828.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/ruzixusonexenajevesovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/android_navigation_with_bottomnavigationview.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/xokuvuvenexepevejuwava.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/74325534036.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/jatajuruno.pdf
    • https://cdn.shopify.com/s/files/1/0438/7389/4555/files/suxefapevegesurid.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/rasomogigenorajutivud.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_off00006925.bin
3793eca896d7b36b0500c4ea6804693a33c4867777c8ff395f6d3c425983783d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 5152 bytes
font_01_sfnt_off00007ad0.bin
a667a743fb6fd60642f7b9579d8108b10781cd1dd777d090a1498771c00acf34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 9352 bytes

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