Malicious PDF — malware analysis report

Static analysis result for SHA-256 e848204923afdb9d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 02:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d933476e2b70063ec6bb0d99d75deba SHA-1: 3bfa9a116216d8a8f89d4d091726e82ffe6018d5 SHA-256: e848204923afdb9d7ff7203e1e44534586abd8f4b339b92013c25de797058e7b
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'Osmosis in a plant cell lab answers' and includes the malicious URL. This suggests a social engineering attack where the user is tricked into clicking a link under the guise of finding answers to an academic exercise, leading them to a malicious site.

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=osmosis+in+a+plant+cell+lab+answers
    • http://files.constructionandtreeservices.com/uploads/1/3/2/6/132682627/bedawumifulafa_fasuk_wodijunifolazu.pdf
    • http://rojegebok.rareearthsmiths.com/uploads/1/3/1/3/131398020/tenotowiluxug_luranetela_kibugijegax.pdf
    • http://files.rusticridgelabs.com/uploads/1/3/2/6/132681028/6917331437ba6.pdf
    • http://files.lidetectingresource.com/uploads/1/3/1/8/131856516/dujimezujesitipen.pdf
    • http://files.casewatson.com/uploads/1/3/1/4/131437087/potiv_gujimutipata_medexi_gaferaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/6224/5029/files/apollo_fire_alarm_panel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/nagugezumakozetafu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8820/6238/files/kata_kata_luck.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/87981356796.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/gedotoxudusukotafipemene.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/brusters_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/61303888641.pdf
    • https://cdn.shopify.com/s/files/1/0450/5387/0232/files/napoleon_bonaparte_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/pinofekefomefevagonulok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/sifts_head_3.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/33243581475.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/present_simple_present_continuous_exercises_perfect_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.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_off00007306.bin
b399006ec372311691186deb6dab4c06e988878946dea90861ecbb343ce54627
pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 5336 bytes
font_01_sfnt_off0000851d.bin
3f6ce5d078776b751d583a21f4002b323d4f770e7e5520a8dd21a101a6d8107e
pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 10392 bytes