Malicious PDF — malware analysis report

Static analysis result for SHA-256 3faa51cafcae9c71…

MALICIOUS

PDF

53.9 KB Created: 2020-08-04 13:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1cb95d22164f1065e18da3e9a61da4c SHA-1: 818ce379acae5ec877a73ae3a6ecc8a73ba77f5f SHA-256: 3faa51cafcae9c710e84356a2ecc8315e57b5ae0e50f1ff70f228c8bd950a8b5
128 Risk Score

Malware Insights

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

The PDF file contains a lure for 'Agile exam questions and answers pdf' and embeds a link that redirects to a known malicious domain (ttraff.cc). This indicates a phishing or social engineering attempt to redirect users to malicious content. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious link. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector link is a strong indicator of malicious intent.

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=agile+exam+questions+and+answers+pdf
    • http://files.readingfamilyaid.org/uploads/1/3/1/3/131379276/8e909c3e288d.pdf
    • http://files.eaglehotyoga.com/uploads/1/3/2/7/132740327/rurosovaluwelijipe.pdf
    • http://files.energiepositief.info/uploads/1/3/2/7/132712508/gofebopepapepu_fakedefu_pelemebasorug.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/jusekovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/rasomosefadosove.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/fonusajidedon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/idm_full_toolkit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/78286633839.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/duxigazakeded.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/95963365991.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/wodagofikaxola.pdf
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/muxikadudineked.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/goworunazelefuderadej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/perspectiva_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/55884589687.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/aliens_love_underpants_story.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_off0000938f.bin
0a306c9ede44a8ece0087601c2cb47ba60deaba25ef7db81220fcd839e57f4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x938F 5636 bytes
font_01_sfnt_off0000a6b8.bin
e72860ba46316ac0a00161c604236ab7b0527c7077a8bd2289b0d70b5cbf5247
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B8 10376 bytes