Malicious PDF — malware analysis report

Static analysis result for SHA-256 6172e0ffc29cc963…

MALICIOUS

PDF

57.5 KB Created: 2020-08-10 05:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a67a2d3f2b67cffebe915052b98541b SHA-1: 5fa42da87b39067a3ce9d2cf248f999b27e41bf2 SHA-256: 6172e0ffc29cc96348de997c2657e6ffcaab4ccba188b24bd0d2ec6c6f50d10e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as information about gas turbines, which leads to a link farm of numerous other PDFs. This suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=axial+flow+gas+turbine+pdf
    • http://files.glambyjac.com/uploads/1/3/1/6/131608017/198820.pdf
    • http://files.bethgatesglass.com/uploads/1/3/1/3/131381946/deralapafirefir-nevufa.pdf
    • http://files.andysidornxtlvlfit.com/uploads/1/3/0/7/130775727/kotexogififike.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/77388252592.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5263/files/80998722197.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/85096835116.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/raxevuvodumoxumelov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/20782413918.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/una_profesion_peligrosa_luciano_canfora.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/10691278343.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/dowusozojefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/subumazonubepenexajiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/budurebeduda.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092cf.bin
e4fbac4b7df96e51bd008f49c4e9622e9bcad8726a8b6b3dc7862a9a5ea4d619
pdf-font-stream PDF embedded font (sfnt) at offset 0x92CF 5380 bytes
font_01_sfnt_off0000a538.bin
52ffb8618a25a4fdcf15185d67840409579287b50fc3de9457c9ee82ff1f9e17
pdf-font-stream PDF embedded font (sfnt) at offset 0xA538 11480 bytes
font_02_sfnt_off0000caf7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF7 4324 bytes