Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3559474afcc48c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 21:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b2b2f7293692bc16046243f637f163 SHA-1: df97900b8c403c4407375956c2cb9630b2300db2 SHA-256: 2b3559474afcc48c926f1a4297523d884d7808cbb4faf0a1470f8953323b056c
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'fishing barents sea crab guide' and includes the malicious URL. This suggests a social engineering attack where the lure of a guide is used to trick users into visiting a malicious site.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=fishing+barents+sea+crab+guide
    • http://files.neilkatzconsulting.com/uploads/1/3/2/6/132695513/lilolejobum_wujiv_fomovimeredivak_mogelu.pdf
    • http://files.chriskellylandscapes.com/uploads/1/3/0/8/130814769/voresutaseg_vifaxalemeludi.pdf
    • http://kaxisag.bellaangelmusic.com/uploads/1/3/1/4/131412032/mujagerivepizutipiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/2423865492.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/90757401133.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/tajerapobafujilakeze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7299/4971/files/20626617938.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/kajujubikawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96328102714.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/pidoralulofasipipulij.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/11964429984.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/48659975610.pdf
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/sabamumin.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_off000063b2.bin
4b8592d25045071f2e085a304b7fc301e208f7ed021eed236844c1f487724f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 5264 bytes
font_01_sfnt_off0000757f.bin
da30ebfe82ce329930efaf0a5bf3cd2311d8012d5e47fcad4d8409a4794d25af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757F 10192 bytes

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