Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c79d26f093976f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-09 11:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca8a1254f8db1fdc49012b1e9faa024 SHA-1: 38ad2a842dd668e5d4138f18be03d58d2f506de7 SHA-256: 42c79d26f093976f444490d2e6ac806b64275d77f030697c19dd17f680d8417a
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a PDF to JPG converter. The document body and heuristics indicate a lure to click this link, which likely leads to further malicious content. The presence of numerous external PDF links suggests a link farm used for SEO poisoning to increase visibility of the malicious lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+file+to+jpg+image+converter+online
    • http://files.vn.seameocelll.org/uploads/1/3/1/0/131070212/a44622c38.pdf
    • http://files.chandalinchamplin.net/uploads/1/3/0/8/130874416/1643125.pdf
    • http://files.bnhlivestock.ca/uploads/1/3/1/0/131070767/ab47c99adf4.pdf
    • http://files.discovery-wellness.com/uploads/1/3/0/9/130969966/5160099.pdf
    • http://mogov.katieluka.pl/uploads/1/3/1/6/131637649/1654217.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/fukifusoxupedizumegef.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/vejav.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/kiwinikimapoxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/45722537898.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/ludaneditenuzasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/guvivowuginigeguna.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/98217496172.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/8732982754.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/tipos_de_organizaciones_sociales_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/34953985549.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/54969973824.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_off00005d7e.bin
ef8fe35b9fce9cfc90c86b9e4a0fb659a9758d5a782b8b36c009257a641050ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5432 bytes
font_01_sfnt_off00006ffb.bin
8498e8f041c2763e38db6d601b0516ececc0afe3e80bdbc63d5f730b93a7ce6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 10552 bytes

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