Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a5be291197df24…

MALICIOUS

PDF

56.3 KB Created: 2020-08-30 17:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37fc3252858fb2ed29002cbf95f8ec3d SHA-1: 48e5787108f242e84fe5b5ca1fa68bee792afe9b SHA-256: 54a5be291197df24472c50cf6091d04da642bc9a3117c343a2c6ed2d080e2cc6
128 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link identified as a malicious redirector. This link, 'https://ttraff.cc/wix?keyword=boolean+algebra+class+12+computer+sc', is presented within the document body, likely disguised as a call-to-action or download button. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious URL. No scripts were extracted, but the PDF structure and the malicious redirector URL strongly indicate a phishing or malware distribution attempt.

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=boolean+algebra+class+12+computer+sc
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/23589518158.pdf
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/10890160286.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/malayalam_english_arabic_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/dupupemufuxoboriwijuveba.pdf
    • https://static.usrfiles.com/ugd/b8c837_61bd09aa55164e8187b767f01e3b8b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e824070f6e1745b1bfb4cc3cb22c099a.pdf
    • https://static.usrfiles.com/ugd/6a7407_bd094b3a277649498dd9c6e25defa2a8.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/venomovofav.pdf
    • https://cdn.shopify.com/s/files/1/0466/2670/1477/files/seantree_ampoule_mask_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/ruluget.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/xoviramevulapemuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/js_random_number_between_range.pdf
    • https://cdn.shopify.com/s/files/1/0441/4137/9736/files/diploma_certificate_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/36769134360.pdf
    • https://cdn.shopify.com/s/files/1/0433/9528/5159/files/7710703267.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_off00007c9d.bin
263cc37c99713feca26cc6552eaf2290fc816942105dc3637f2d42dc559f58f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9D 5624 bytes
font_01_sfnt_off00008fad.bin
059027ec48f593d7ceb9e0753bd172960c548390058ee85e9079204af9fb07bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 15252 bytes
font_02_sfnt_off0000bf29.bin
ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF29 16088 bytes