Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a1c7d188d3a95f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-27 19:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b127f88d9dc388eb691339f0d2159f1 SHA-1: cb4f23820028abde3276edce2939e9e21f1c6013 SHA-256: c4a1c7d188d3a95f557fc56bacb74840e97635e11ca48d174665b10564859da1
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body and embedded URLs suggest a lure related to 'apics cscp exam questions'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/pify?keyword=apics+cscp+exam+questions
    • http://files.exercisewithtracy.co.uk/uploads/1/3/0/8/130874240/39d131d0bf7f79.pdf
    • http://webudilo.831.delivery/uploads/1/3/0/8/130815137/bufuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/35416642210.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/doreruni.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/89567915402.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/16324466889.pdf
    • https://cdn.shopify.com/s/files/1/0466/6694/0581/files/angard_staffing_holiday_request_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/auditoria_ambiental_ejemplo_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/linear_algebra_system_of_linear_equations.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/bricked_android_not_detected_by_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/kathanayakudu_ntr_telugu_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/88309105781.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/22285925499.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/72495008912.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/exerccio_tabela_peridica.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_off00006205.bin
18241a24bd2509e5e8d83a5d39a4ace20cb297ae4c431287b87c2e326cc66b8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 5132 bytes
font_01_sfnt_off00007371.bin
e9eb23fe83cd4649cded7a980bf9ebdb398ecba933cf95bb34f6994252a2d520
pdf-font-stream PDF embedded font (sfnt) at offset 0x7371 10528 bytes