Malicious PDF — malware analysis report

Static analysis result for SHA-256 e275515cdec04e47…

MALICIOUS

PDF

48.6 KB Created: 2020-08-03 02:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33177e890591dd0a3a98bf26a7681ac SHA-1: 3c15502d9a5a458651cdff4f8a5602acebf1e5fe SHA-256: e275515cdec04e471cc18f5176718c250c42bbeb2d260e4643ceb7091b7da67e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify.com domains hosting other PDFs, likely as part of a link farm for SEO manipulation. Crucially, one embedded URL, 'https://ttraff.cc/pify?keyword=apache+storm+tutorials', is identified as a known malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, potentially for further exploitation or phishing.

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=apache+storm+tutorials
    • http://files.depoorters85.com/uploads/1/3/1/6/131607053/valebi.pdf
    • http://files.mx.cbisociety.org/uploads/1/3/0/8/130813855/3379694.pdf
    • http://files.northmiresouces.org/uploads/1/3/1/3/131379590/4509217.pdf
    • http://files.diaryofacancerresearcher.com/uploads/1/3/0/7/130739322/zogofugal.pdf
    • http://files.angelabruchart.com/uploads/1/3/0/7/130739059/monizebepow-sozaro-musifaseban-madomos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/sim_unlock_root.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/wujabubaruvibatem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/71837209257.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/70129956378.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/58862754775.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/60660941483.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/wubakemaxomukurotera.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/40674739357.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/vapimulapasofofujap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8333/files/gitetorexil.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/jofedoloj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006adf.bin
065fb56bb0b97a2d858a435a8cab6acd5fcaed29beea38f3b1404cb70e4abc8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADF 4940 bytes
font_01_sfnt_off00007ba5.bin
1c6226f7661b9c414142ec78e9abbf492f39b3b9fccebe653d2b4bdf2da72bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA5 13416 bytes
font_02_sfnt_off0000a6f8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F8 4324 bytes

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