Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f3832ede033794…

MALICIOUS

PDF

47.0 KB Created: 2020-08-12 07:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 880e26f590d18c0f10fade83c686b73a SHA-1: e320b7cd3469b8970451b58abba64bfe1e4db464 SHA-256: 95f3832ede03379422724d761acc2544a32e4d7a4b549e092d3577cebeb97ce9
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, creating a link farm. One of these links, disguised as academic content, redirects to a malicious URL (https://ttraff.cc/pify?keyword=upsee+syllabus+for+b.+tech+pdf). This suggests a social engineering attack aimed at driving traffic to malicious infrastructure, likely for further exploitation or malware delivery.

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=upsee+syllabus+for+b.+tech+pdf
    • http://files.adventureswithsonatsays.com/uploads/1/3/1/3/131383959/vekafipoderodemu.pdf
    • http://files.yourdayweddingsindiana.com/uploads/1/3/0/7/130776619/kixinukisabefomu.pdf
    • http://files.ccfammo.com/uploads/1/3/0/7/130775431/a3303dfff0b4b.pdf
    • http://files.shoestotheworld.org/uploads/1/3/1/8/131871954/dimironuj_retifupubafuk_fagixe_tutosagok.pdf
    • http://files.naturallyminded.co.uk/uploads/1/3/1/4/131438176/7af975db7.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/aashto_lrfd_bridge_design_specifications_7th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/bending_moment_diagram_formula.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/formal_and_functional_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/redefining_airmanship.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/7333762428.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/ultimate_wilderness_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/binomial_distribution_when_to_use_and_cdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/semi_detailed_lesson_plan_in_english_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/naxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/60595507886.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/70820403046.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/atomistique_cours.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_off00006dac.bin
8003e1c3c7bcb3f8d9d75236a290b8d39e367ff7ee3008f685917ab591af2401
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAC 5508 bytes
font_01_sfnt_off00008061.bin
4c3bdf9c26e09ec1cf5b29791591a23e158094d63c8474e34e38a62f96dc0476
pdf-font-stream PDF embedded font (sfnt) at offset 0x8061 15184 bytes