Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecaa1e47cd1a9bf…

MALICIOUS

PDF

44.6 KB Created: 2020-07-25 17:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41eb70d2c7d0cebd002194425563231c SHA-1: e9d5d1cc748c0e0d1471cab105d856066bb51cc8 SHA-256: 2ecaa1e47cd1a9bf42c6d2deca69533f3ba897a6b64ce19721368e0cf948b1d0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a PDF link farm. One of these URLs, 'https://ttraff.ru/wb?keyword=scan%20online%20jpg%20ke%20pdf', is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous links suggests a malicious intent, possibly for SEO abuse or to lure users to malicious content.

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/wb?keyword=scan%20online%20jpg%20ke%20pdf
    • http://files.johnknoxhouston.org/uploads/1/3/0/8/130813965/a38bf.pdf
    • http://files.runningwithspiritbabies.com/uploads/1/3/1/4/131438397/3166615.pdf
    • http://files.lownsberytech.com/uploads/1/3/0/7/130775379/70838.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/22948045494.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/vubozetekobatix.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/lowoledokiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/nipudamanagavazuvijimire.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/20052938286.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/32022586875.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/janidafemojufut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/tugevatobexolilusozasape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datofugilasififuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/podeziwakidaxazejolopifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/94188275269.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/nejasefinexopojipapak.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/migokivupuxe.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_off00006f0b.bin
eecfbda20fb5d7ced7832f6d366dad0bbb2a18d4080d35fa29a5f2b2e237a58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0B 5000 bytes
font_01_sfnt_off00008019.bin
911e053cbec006471a81c80c37d5832e562067c3470b34e71b39bba419983542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8019 10880 bytes

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