Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c57ec99d1ece24c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 01:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9aba90be6a77c9e7dc9c0b8954b7500 SHA-1: 9ef1e4fc0e68851afa4bdeb1f8facf5ddece85a2 SHA-256: 1c57ec99d1ece24c9cb36d4582393e547c624ee765854bcc705d0d6097db9d6f
150 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a school medical certificate. This link leads to a link farm hosted on Shopify, which in turn points to numerous other PDF files. The primary intent appears to be to drive traffic to malicious infrastructure and potentially distribute further malware or engage in phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=certificado+medico+escolar+sep+2020+pdf
    • http://files.toramartialarts.com/uploads/1/3/0/8/130874067/7470703.pdf
    • http://files.aemiliawidodo.com/uploads/1/3/0/8/130874201/janidawip.pdf
    • http://files.galtfarmsgenetics.com/uploads/1/3/1/4/131453256/bomepibos.pdf
    • http://ratewix.projectxlacrosse.com/uploads/1/3/1/0/131070152/5272c1bb964.pdf
    • http://files.midwestalliancesoccer.com/uploads/1/3/0/7/130739740/wogapaf-megapemizevo-pefedakaxokak-zavunamut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/zugebuledigenexofez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/ritaguboxubilokanoxoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/bozonikalapubinapot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1484/7655/files/hernia_inguinal_e_hidrocele_en_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/croix_kabbalistique.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/teachers_curriculum_institute.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/kukadobabavapugalib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/teen_marvel_lili.pdf
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/febokudoginere.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/zubub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/43413473786.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/nawapogujefebotux.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_off00005f0d.bin
3f612fddcfe970eaecb455ef914a9baacd36d22a01a8f207e77650c3bc2fc448
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 5480 bytes
font_01_sfnt_off00007198.bin
43204ebc130e9ab4cb46db78fd1a950bc25ae38b75ea0d4dc7b062a9784bd46c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 11044 bytes