Malicious PDF — malware analysis report

Static analysis result for SHA-256 e072b034e061b8a0…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 02:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcde134c1ff6cdf7e41a65f2b04391b0 SHA-1: 2459dd98f171f9415cd1ddd8ba706569e5347608 SHA-256: e072b034e061b8a0ee8e7986c9dffec77674afa4e04bab3390c199309f398e0f
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=adverbs+worksheets+for+grade+4', points to known malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to harmful sites. The document body itself is heavily obfuscated and appears to be junk data, with the primary malicious functionality residing in the embedded links.

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/wix?keyword=adverbs+worksheets+for+grade+4
    • https://static.usrfiles.com/ugd/b444d4_85b6567817644733b443e6d40d94643b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdbfd45da51b41ff8c33ee0b174a7a53.pdf
    • https://static.usrfiles.com/ugd/f8de3e_50864e4225cd489e8eb2c500b1e1fed7.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_a2590d3cf02747ec8b122a7620041d01.pdf
    • https://static.usrfiles.com/ugd/3f80ec_589a302b0ff94ebb9e8b3729aa5d721f.pdf
    • https://static.usrfiles.com/ugd/834936_e03e5d4a1e7f465a8d8a555147e0c123.pdf
    • https://static.usrfiles.com/ugd/07625c_6f34f41408724b99947eebbd2b025ad4.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_a5ce47052a9a46e888a055cd5b7d7282.pdf
    • https://static.usrfiles.com/ugd/63d3ad_03c2239dbf3d468cbc8521ea46594757.pdf
    • https://static.usrfiles.com/ugd/96bf9d_4e541e1bac3f42cd98c2dd8236bd6d05.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7280/files/81484731297.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/gijadozamowipinogizapalij.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/rukadaguloxoroximikuf.pdf
    • https://static.usrfiles.com/ugd/173616_0c29586dac494daf86ddaff98e7fcd96.pdf
    • https://static.usrfiles.com/ugd/09c3c7_54d8598d976b4e4b86e621dee4f0bdf9.pdf
    • https://static.usrfiles.com/ugd/95089d_473c6dddf52e4939b08ebecab85867f5.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_off00006525.bin
ad74c5c96835988f75cdea4f56a292fbfa4237642d1559faed681788995bea13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 5572 bytes
font_01_sfnt_off00007833.bin
b82c065d8b1bf94efcbbccceb4bfe44a055662da4c3f47137f31612ff1f7f39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 10152 bytes

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