Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2a7a52b42db0ae…

MALICIOUS

PDF

46.3 KB Created: 2020-07-27 23:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f948f12141d451f598d12ab30c64cf74 SHA-1: 4600e3ff5593749ae3072565acaa9592e2b025df SHA-256: ee2a7a52b42db0aed7d2c43f11c28aaf26183170f5a979edd6bd02e2a731adb5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=poem+analysis+essay+format'. This suggests the document's purpose is to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated.

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=poem+analysis+essay+format
    • http://files.tjpfitness.com/uploads/1/3/0/7/130738928/c27bc52bae6.pdf
    • http://files.bbqgrillsandislands.com/uploads/1/3/1/6/131636855/07626.pdf
    • http://files.keeora.com/uploads/1/3/1/3/131379801/migoziturilo-faragazeral-jetekikawetisod-pidivemas.pdf
    • http://files.newentorchestra.org/uploads/1/3/0/8/130874115/17ab7b27b7.pdf
    • http://files.keeora.com/uploads/1/3/1/3/131379801/migoziturilo-faragazeral-jetekikawetisod-pidivemas
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/23858467244.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/41392101993.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/ninazuvogisalimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/xiwisawovof.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/332086006.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/xewoxonuxavururujusaguk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/45114033105.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/warazasuzevemogide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/22427199115.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/30507422879.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/kemesefox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/murazupit.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_off000078bc.bin
20161b4f0bfa9789cde5b28ac4d3688a6753afb8fc86338b2d2981417f02d816
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BC 4804 bytes
font_01_sfnt_off000088ea.bin
43685d8905fed4d4452fb34e7fe63cf2b52a9bb151c6c0cc587110b113d64427
pdf-font-stream PDF embedded font (sfnt) at offset 0x88EA 10208 bytes