Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b5996e6b0a14ec…

MALICIOUS

PDF

48.7 KB Created: 2020-07-07 12:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26a144e3356976474931bff7ba693167 SHA-1: dd83fbf28ac38374ca5f96707124afe8903ff087 SHA-256: 16b5996e6b0a14ec19c9037602e95fafa440a5a68e7ac4f103fe67a79bbe33cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the document links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document's purpose appears to be to drive traffic to these external sites, potentially for SEO manipulation or to serve malicious 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.com/wb?keyword=mapa%20cartagena%20murcia%20pdf#mapa+cartagena+murcia+pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.bbawakeblogs.com/uploads/1/3/1/4/131437268/66807.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tasuzujud.files.wordpress.com/2020/07/59349661362.pdf
    • https://zexekiko.files.wordpress.com/2020/06/80434470004.pdf
    • https://tizakifu.files.wordpress.com/2020/06/lukemi.pdf
    • https://vobadir.files.wordpress.com/2020/07/dusaganubolofulezigabo.pdf
    • https://sesuxegu.files.wordpress.com/2020/06/togarebululituvazanera.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_off00007f86.bin
57ae6a338e8ab0c0c5b01542a20fe3ff2b6a1ff9fe2c19416879bdf58eb1c4a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 5044 bytes
font_01_sfnt_off0000908f.bin
d64b98744f8d351aac31d08b13c91279863e572f74a402d6914a68fa59228ff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x908F 11424 bytes