Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f853ddfc7ad783…

MALICIOUS

PDF

50.3 KB Created: 2020-08-17 13:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 557bf9896bd043f8823fcff4fa2247ee SHA-1: 165283a3315ab2b93526ba16204108fb3241faf0 SHA-256: 31f853ddfc7ad783abfc84fab667a2fd36836900bebea802bd34f2a722f3aaa3
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for a malicious redirector link and a link farm, indicating an attempt to drive traffic to malicious infrastructure. The document body includes a call-to-action phrase, reinforcing the lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims 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.ru/pify?keyword=ews+affidavit+format+in+english
    • http://files.spotlightseniorserviceslasvegas.com/uploads/1/3/1/3/131398428/zixuxuwesidusuduv.pdf
    • http://xinalabo.fosterenterprises.com/uploads/1/3/0/9/130969054/mofutadisadupatizil.pdf
    • http://resozed.georgethequarter.com/uploads/1/3/2/6/132681862/ralufotelu-pogiporakage-telenaseg-zubefabezog.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/school_accountant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/guxizolagizunojirag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/na_step_working_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/52002061328.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3166/files/begifojozovomojabezubamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/10485500894.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/bone_marrow_aspiration_and_biopsy_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/vosemovutukopufol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/cbse_maths_book_class_10_solutions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/59097287689.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/52590835885.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3486/files/rakejuxetekarixog.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_off0000797b.bin
28ec0c4746f27740f418e82496714e41f39711527b105a0490f8d8a2ed57c637
pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 5428 bytes
font_01_sfnt_off00008bde.bin
9b146d2c934a520784f0f7b6292e1f5d041a2829592921f2dce155884f7dc4d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDE 10672 bytes
font_02_sfnt_off0000b081.bin
2573663731bd43408ba2f021839d35c95f105c70180fb649f07e447f7f39196e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 2808 bytes