Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcaef01d0346bc7…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 00:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7552dca2cf5ee5bf457c1d45782f6265 SHA-1: addca1c2574120a050da63109efa5080d4d03478 SHA-256: bfcaef01d0346bc716db598d5fe4b77beacdfc6c66fdf19f72be52b51d5c3aca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=write+a+paragraph+about+yourself+pdf'. This URL is likely used to redirect the user to a malicious site. Additionally, the PDF contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO manipulation or to obscure the true destination. The document body text, though partially corrupted, includes the phrase 'Write a paragraph about yourself pdf', suggesting a social engineering lure.

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.com/pify?keyword=write+a+paragraph+about+yourself+pdf
    • http://files.globalqualityenglish.org/uploads/1/3/1/3/131398555/1f8eefe7f516.pdf
    • http://files.archilamusic.com/uploads/1/3/1/3/131398235/6943018.pdf
    • http://files.beyond-the-belly.com/uploads/1/3/0/8/130873918/a49f5964f7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/84567532780.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/10553908621.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/negative_effects_of_globalisation_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/xelademokabam.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/27225289458.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/natumuxulunikibedisejako.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/wudatawoxasiveredelemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/tujanokovidobaniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/popokufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/fopexinawukifakix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/ganimupunorevebedez.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/us_airport_codes.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_off0000653c.bin
3cd6470272e3cfa264a8860262aafa8f86ad2ad35870cd6e5683de781c701ea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x653C 5556 bytes
font_01_sfnt_off00007825.bin
05f6db30b64148f8ed8cb1f49e3f684430ebac7377c0c048b8ff2bd6e2924398
pdf-font-stream PDF embedded font (sfnt) at offset 0x7825 9808 bytes