Malicious PDF — malware analysis report

Static analysis result for SHA-256 43eb7adb6083b52c…

MALICIOUS

PDF

48.0 KB Created: 2020-08-21 23:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58796de509b75f2906661880b69ab19e SHA-1: 4830ebc806b99594188ca7280468436ce83b0605 SHA-256: 43eb7adb6083b52c252d9d479852ab7d03a0d5b3a35a63548aa95f9e1987ffd2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to medication. The document body also contains this keyword and metadata indicating it was generated by wkhtmltopdf. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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=metformin+xr+starting+dose
    • http://defodur.saenzmastering.com/uploads/1/3/0/9/130969521/ridixemogo.pdf
    • http://files.sacajaweadar.org/uploads/1/3/0/7/130738719/vabobino.pdf
    • http://files.firstofwarren.com/uploads/1/3/0/7/130775228/kufukafowid_tukupa_rosisuvimu_xejuf.pdf
    • http://files.ueshirofloridakarate.com/uploads/1/3/1/4/131438038/xenug-gofukerovose.pdf
    • http://gefop.sarasotahorse.org/uploads/1/3/0/8/130813528/pokoxisekadawor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/24921036029.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/4843007075.pdf
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/97164603256.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/tujerozupu.pdf
    • https://cdn.shopify.com/s/files/1/0448/3996/0737/files/joindre_sur_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/colitis_ulcerative_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/sazufasorewexodesiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/kiwegibon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5790/files/classification_of_entamoeba_histolytica.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007141.bin
f42f77152befcb580c55ed9c9a0017fa24c99962e22d44ce2c07321b624dd2c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7141 5056 bytes
font_01_sfnt_off0000825d.bin
77d4e2d44545b4be71284ee9752f6f1efa7957466ad30448cf4d8c4aad0e8401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825D 10020 bytes
font_02_sfnt_off0000a49a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49A 4324 bytes

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