Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5caf6d66a76bce…

MALICIOUS

PDF

55.5 KB Created: 2020-08-06 00:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9cad9ec72cc87ede89525f78060e8ee SHA-1: 8d1267b8c9322910af64c66e8fc499feb70ec7aa SHA-256: 6a5caf6d66a76bceab03926ec4edc1f0a9ee2849eaa71cc82b7c41d84e011b8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.cc/pify?keyword=prinsip+titrasi+permanganometri+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or obfuscated, but the presence of numerous links and the malicious redirector strongly indicate an attempt to lead users to harmful content.

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.cc/pify?keyword=prinsip+titrasi+permanganometri+pdf
    • http://files.vibramhk100.com/uploads/1/3/1/6/131606206/kagowamowiro_vifawudatigugar_kabaxipubasez.pdf
    • http://files.funny-jokes-quotes.com/uploads/1/3/1/3/131379296/pigexukus.pdf
    • http://files.keystonekidsgo.org/uploads/1/3/1/3/131381066/zonijejovamasebo.pdf
    • http://files.eukariot.com/uploads/1/3/0/7/130739174/367a8aef9333.pdf
    • http://teramer.assertion-evidence.com/uploads/1/3/0/7/130776483/3fba3a8640e068e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/41778993418.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/ralov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/satodexolunakaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8497/2183/files/mojatoporonex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/copleston_history_of_philosophy_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/nizul.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/39176950694.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/saint_row_3_cheat_codes_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/50260013269.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/musawajofukidusari.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099a2.bin
afd7c13ba7e85b6e9ab1a6b6f06e1c3bc28dfb9d1f2be6ff30e81da98a8740fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A2 5332 bytes
font_01_sfnt_off0000abae.bin
c5967add7231c14b6989735ab1520f428994515e940b02d1230f2c6db0fbea6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABAE 10404 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.