Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf062e797b250ce6…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 15:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced7920627ea073a7cb47fdf2a643ab7 SHA-1: 7a33575d59cbbea5844f1a1ba2ccf8187cc2de5f SHA-256: cf062e797b250ce637e5e642fa91889358703e8564e9c341b42914030df9e168
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as educational content, likely for SEO manipulation and to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many pointing to Shopify, suggests a link farm for SEO poisoning. The primary malicious URL identified is https://ttraff.com/pify?keyword=biologi+sma+kelas+xii+kurikulum+2020+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=biologi+sma+kelas+xii+kurikulum+2020+pdf
    • http://files.myanalogworld.com/uploads/1/3/1/0/131070144/pekazejog.pdf
    • http://files.bikerbabesoaps.com/uploads/1/3/1/4/131437147/satimenevobut_sanuzawolo.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.thestockmansbreakfast.com/uploads/1/3/0/7/130740033/60895d03037f1e2.pdf
    • http://files.lejolijardin.com/uploads/1/3/2/3/132303373/titazubipetuxujolir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/49764663038.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/32941239928.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/76783042592.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/13195560238.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/zanamujagikekofarokozofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4157/files/kusufimipatizefini.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/convert_ppk_to_pem.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/gebemoxot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/bharat_gas_subsidy_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/dobewesazinamafeboberexo.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_off000062bb.bin
0710baa33e6dfb2523a4ac072335fd13467f08aee662086e3c802beb199d4434
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5816 bytes
font_01_sfnt_off0000767e.bin
e31c206d82f9ffdd47e57ab237ce6aae4a6245d330e87320e723f1e6e907adee
pdf-font-stream PDF embedded font (sfnt) at offset 0x767E 9920 bytes