Malicious PDF — malware analysis report

Static analysis result for SHA-256 7317bbc578d6fc97…

MALICIOUS

PDF

51.3 KB Created: 2020-08-06 14:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a62acfcb539bf8108ee6a9265bbd1b SHA-1: 21c053a42451b33ab4afc35dfcc3538aba0493df SHA-256: 7317bbc578d6fc97122984b9e473be4f63ba330953ac88b885a7c2de27fa26f4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=eclampsia+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf`. This suggests the document is designed to redirect users to malicious sites, likely as part of a phishing or scam campaign. The presence of many external PDF links also indicates a link farm strategy, common in SEO poisoning attacks.

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=eclampsia+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf
    • http://files.slowfiber.com/uploads/1/3/2/6/132682663/3133103.pdf
    • http://files.jesimall.com/uploads/1/3/0/9/130969999/cdc7b48.pdf
    • http://files.jessicabechtelart.com/uploads/1/3/1/4/131454034/407975.pdf
    • http://files.scribblesbymaurie.com/uploads/1/3/0/8/130874655/1598169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/tajimorevikexadonos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/14558164278.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/65824028741.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/how_to_sort_in_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/poxidegobupipitomebegat.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/sidiganomajelokujumawonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/yamaha_704_remote_control.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/28872444369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/66522886071.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/dd_form_1750.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/2003_honda_pilot_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/xosujavadisujuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/lanugurenakekeneruzom.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7e.bin
98f722ebfbe92509781f6d7418740dd50884dd6ab000dbd5ae2081bc9615220b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 5164 bytes
font_01_sfnt_off00006fff.bin
cd5e481ffdf456c14e1948f217ee0edb361ceca691f28702da075feefd01b6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFF 6180 bytes
font_02_sfnt_off00007ffa.bin
4c3deef2053f5fcf53abc609640ee52eba3b8b26e5bb28c86454f67d287f5066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFA 7220 bytes
font_03_sfnt_off00009379.bin
427bec5ee0e26407097c2face352fa641c28b9ca4abc503fda71ca9cedfdb4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9379 13520 bytes

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