Malicious PDF — malware analysis report

Static analysis result for SHA-256 590d090f729fc872…

MALICIOUS

PDF

127.9 KB Created: 2020-07-26 17:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0331a18e707ec2c375387668c087585 SHA-1: 6f8f1a839caa5ee570416a16b65244fe5d3e77d3 SHA-256: 590d090f729fc872295482edcc386707da73627eefaf213ab5bed423719042fc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=domain+archaea+pdf
    • http://files.leducregioncares.org/uploads/1/3/1/3/131380158/45448.pdf
    • http://files.apwcsa.ca/uploads/1/3/0/7/130775997/9225cc13cc6b7.pdf
    • http://files.jerichospecialties.com/uploads/1/3/0/7/130739557/miwavopir-munoxajupi-duvofolonifiwiw.pdf
    • http://files.bbawakeblogs.com/uploads/1/3/1/4/131437268/66807.pdf
    • http://files.walterslawpc.com/uploads/1/3/2/3/132303081/8124947.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/98303446553.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/kexulugomojagasaxugaxiti.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/48971781759.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/8023051190.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16779745642.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/gamopeponugevaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/ravedisew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/85040641649.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/6948693220.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/kizuvavina.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_off0001adda.bin
d8e8c5d4672c3572efd127747ae7b3892fa349d35380063307fda6f94b73bf42
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADDA 4892 bytes
font_01_sfnt_off0001be3c.bin
e0c50e36a0100348f4cde36ad107a7469a0ac0997acf03e40962bb8221fa0944
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE3C 16188 bytes