Malicious PDF — malware analysis report

Static analysis result for SHA-256 4825c832b7ab73bc…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 03:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f750f25340f79d82ab04a9fb5db3da6 SHA-1: 6733544cfde137d39005978de3577cd84b94b9c6 SHA-256: 4825c832b7ab73bc27ea5e25b1c88d4aab51bf4ce45f8e651507ef15aa88ae8e
120 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, ttraff.ru, disguised as a psychology PDF. Additionally, it hosts a large number of links to other PDFs on Shopify, likely for SEO manipulation or to spread further malicious content. The document body is heavily obfuscated and contains the malicious URL, indicating a deliberate attempt to mislead the user.

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=psychology+questions+and+answers+in+english+pdf
    • http://files.georgiasociology.com/uploads/1/3/0/7/130739835/lojupabivew_ruriwiki.pdf
    • http://files.unitedcollections.net/uploads/1/3/1/4/131406811/tezeve_rebef_ronotufu.pdf
    • http://files.bukekan.com/uploads/1/3/1/3/131381919/mimepesowimetef_pesufetagadag_zodejo_pafevolurovob.pdf
    • http://texonuwuz.sybaritic.com/uploads/1/3/1/1/131164250/60903b.pdf
    • http://files.jointventurephysiotherapy.com/uploads/1/3/0/7/130776821/vulefut_nezemobodikiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/91963356573.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/cvx_earnings_date.pdf
    • https://cdn.shopify.com/s/files/1/0436/8341/4169/files/20576057283.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/39933098342.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/kujipugamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9179/files/73104085651.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/pofugakubarabof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/unity_coroutine_timer.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/algebraic_structures_groups.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/77757443956.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/sewokaxegukisodife.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_off00006796.bin
c214a644a6341c4f6e86f58842b01343c4b5968d839472bc9890cd2cfa422c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 5736 bytes
font_01_sfnt_off00007b23.bin
0fe0d0e786be64ed72b0d68c09ce92ec677c6ea1fe788b9f12ae74d082bff5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B23 10096 bytes

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