Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf1377734d02119…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 04:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56a130bace3973c1f5b213d8b2bfd2d3 SHA-1: 0f7638bb4a7ffa81add0e451a3a34bb3d86b5509 SHA-256: edf1377734d021196dc611f06e33dc27c506464c74b8f6edc345791203e1895f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. One such link, https://ttraff.ru/pify?keyword=ark+survival+evolved+engrams+guide, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL. The presence of numerous links suggests an attempt to manipulate search engine results or lure users to malicious sites.

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.ru/pify?keyword=ark+survival+evolved+engrams+guide
    • http://xawobiso.erikawharper.com/uploads/1/3/0/8/130873927/nuruwabi.pdf
    • http://files.newyearsknockout.com/uploads/1/3/0/7/130775850/b1416a.pdf
    • http://mibexagi.kmmcfarland.com/uploads/1/3/0/8/130874435/26cd135.pdf
    • http://files.pebblebeauty.com/uploads/1/3/2/7/132740329/zerikipebugavo.pdf
    • http://zutigifa.lighthouseontheprairie.com/uploads/1/3/2/7/132740873/dasibipogegoxareb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/bigajexur.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/zokidulaman.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6045/files/90767540896.pdf
    • https://cdn.shopify.com/s/files/1/0435/2632/4383/files/learn_english_basic_words.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/fetch_async_await.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/74819557133.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/46905785541.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/jifosizuxowuna.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_off00006640.bin
35a01712b64c81b12007760f3ade7141c6241b9addfbefc9032c0851ecbde791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 5256 bytes
font_01_sfnt_off0000780c.bin
abf123a9503cda536d2205c3234c614bf7a6032594091873eac70ae12a8a29b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 10020 bytes

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