Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a917ace77e9f09…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 19:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e81db16a503fc4e053670bcf24cd57 SHA-1: f408f30b941fe54d5de13a6b6e3053f70de2f16e SHA-256: 39a917ace77e9f091e0c6d35f860637a7e68bc29dfe6d6d404f15808f18fac2b
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body also contains a call-to-action phrase, suggesting a lure to click the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/wix?keyword=ocejwcd+study+companion+pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/87688732446.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/tafigiwadojuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/buvomabosuminuwerajazeruv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/wamorisodewubafuloni.pdf
    • https://static.usrfiles.com/ugd/2c8d66_cc964b5db0e247368b741c7055380184.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ed6d31234ea5a6c78f6d21b6cf85.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/ronavefosamumoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/filizovanaselizidomipad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/xifumisirikar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/riporidasopuwaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1158/files/kathi_mela_kathi_video_song_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/75356753747.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_off00006b95.bin
eb3dd963ef183baa9e3e1648986ae72090cc89e34a5d9fab5a1ce2b80194ad72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B95 5352 bytes
font_01_sfnt_off00007dd1.bin
77c175df1f8ffc0483633d67bf70772b335308f29eb684f0b028fc24299bc365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD1 14744 bytes
font_02_sfnt_off0000ac3b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3B 4324 bytes

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