Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b16317f1fbed22…

MALICIOUS

PDF

50.8 KB Created: 2020-08-07 03:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b419c8953190d007795231fc88bf70ab SHA-1: 08ec28437e9a8b9ed3d40ad2e3e8087f37a1cd27 SHA-256: e2b16317f1fbed22faef4d1fe1cc5cef401b60d86daa5b2f1fcfe7f5e58a0e6e
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic educational content, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This suggests a phishing or scam attempt to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=10th+class+maths+similar+triangles+solutions+pdf
    • http://kezitu.rachelyuengaetz.com/uploads/1/3/1/6/131607600/jivovadixi.pdf
    • http://bedebaxa.bohemianattic.com/uploads/1/3/0/8/130874493/kujoper.pdf
    • http://files.malamathesea.com/uploads/1/3/0/7/130739593/lezupera.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/ruzawidabafuniridevogomom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/xareromevebi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/selepixid.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/2015_ap_computer_science_free_response_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/math_glencoe_algebra_1_online_textbook_rhy.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/rimworld_raw_fungus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/dapames.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/carthusian_spirituality.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/sims_4_remove_censor.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/mefetizaseloxosafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/50385499039.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/sidotitezafefikibiwuxejan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648d.bin
db64a4691a761e65542288d07dfa48ea9a963adb995d2426cc5bdd736a69c6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 3184 bytes
font_01_sfnt_off00006fe3.bin
cdf3cb936f1943ea7305630820c2477ddb797e20b320beab5b127e936ce4f9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 5668 bytes
font_02_sfnt_off00008300.bin
0d5c3e1f774398e358b83845b9b8620e916f89de6a59fb42330ee6ad1499889c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 10788 bytes
font_03_sfnt_off0000a7f4.bin
ff9b5dc18539c2b837c92603164103cae0a5cd3553bd51da486aef1a127e3e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F4 16204 bytes

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