Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a070b99798a159…

MALICIOUS

PDF

52.4 KB Created: 2020-08-10 16:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab033e186395c6f120c57e49a7cf1da SHA-1: 6290824cd0aede7a17b3d658eec3624c66ff2354 SHA-256: 42a070b99798a15991b8eaf0c66a9d74b81be16ef2f4d5c0b2a193ec3ed7f62b
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is further obfuscated by a query parameter related to 'bteb exam routine 2020 pdf download'. This indicates a social engineering lure to trick users into clicking the malicious link, likely leading to further malware delivery or phishing. No scripts were extracted from this sample.

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/pify?keyword=bteb+exam+routine+2020+pdf+download
    • http://files.prospectingmimeticfractals.com/uploads/1/3/1/4/131453124/fotoli.pdf
    • http://files.leannwiggins.com/uploads/1/3/1/4/131437599/3127643.pdf
    • http://files.craftedbydiclaro.com/uploads/1/3/2/7/132712093/1407296.pdf
    • http://buzeg.starbrighttherapydogs.org/uploads/1/3/1/4/131407089/kenozotoxol.pdf
    • http://files.craniosacraluk.com/uploads/1/3/1/0/131069897/906c273288823.pdf
    • https://cdn.shopify.com/s/files/1/0430/7874/6261/files/tatonipux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/star_wars_rouge_squadron_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/arabic_alphabet_pronunciation_in_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/vegokafikoxobaguwofomud.pdf
    • https://cdn.shopify.com/s/files/1/0435/7043/0115/files/jquery-_1._10._2._min._js.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/19142587112.pdf
    • https://cdn.shopify.com/s/files/1/0441/0182/8760/files/96820342776.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/tuvizajiwuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/tableau_de_l_alphabet_phontique_international.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/58842216420.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_off000065a1.bin
d62ce6f81109438b0afdf2b980baee4b978074974909a8ee8695eea57b69eb88
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 5632 bytes
font_01_sfnt_off000078cb.bin
1346af142916f20323df827ff5621ae730f1fbaf4445e1d00831736da9d4bb31
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 13160 bytes
font_02_sfnt_off0000a1a9.bin
088b64eabb79eba1cf161b72358ed3709aa664f4ee3ade4b04509d4ab04507f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A9 10060 bytes