Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24ecfe041bb6378…

MALICIOUS

PDF

40.4 KB Created: 2020-08-25 05:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d1df49447c37ec9662254a15d4b7ac9 SHA-1: 08c9c51f33820e5b0dc273da92b1850443b48fa2 SHA-256: d24ecfe041bb63788ab7533c6a1c4e758444af5e4404c718603b9341f8209984
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL is 'https://ttraff.cc/pify?keyword=converting+units+of+time+worksheet+grade+4', which is likely used to redirect the user to a malicious site. No scripts were extracted from this sample.

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.cc/pify?keyword=converting+units+of+time+worksheet+grade+4
    • http://falade.eibenteaching.com/uploads/1/3/2/6/132682974/dujakubatir-rawemeso-sawula.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/20491870155.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/fugumaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/wotobubebizubi.pdf
    • https://cdn.shopify.com/s/files/1/0462/7156/1890/files/electron_configuration_worksheet_level_one_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/70138473381.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/mupomit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/24741757939.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6649/files/mimewerepoxevogiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/construction_company_profile_sample_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/guided_access_apple_configurator.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/dns_error_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/xotuzudiwopore.pdf
    • https://cdn.shopify.com/s/files/1/0430/3283/8298/files/xigafeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/fekiraboduxamiwigulunewu.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_off00005230.bin
104b8316682034148f674023844566211759213266b27aa14ee627388e8890b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5230 5496 bytes
font_01_sfnt_off000064d5.bin
bdcc8bdcd68ade56e342ce81c0fad0e0a3384310d41a7279fd804a9d928855e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 9876 bytes
font_02_sfnt_off00008690.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 4324 bytes