Malicious PDF — malware analysis report

Static analysis result for SHA-256 16989e6f9529170f…

MALICIOUS

PDF

45.0 KB Created: 2020-08-06 22:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8258f65117abca79c9d652860d789b2d SHA-1: a95d5aa74a3a4a32ca900fcda8ee54972b924070 SHA-256: 16989e6f9529170fcb38a2c692b567e882c3880ec3497a0067b022e716e93a97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm. The primary malicious URL is https://ttraff.cc/wb?keyword=historia%20de%20la%20drogadiccion%20pdf, which likely serves as a lure or phishing entry point.

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/wb?keyword=historia%20de%20la%20drogadiccion%20pdf
    • http://files.maternalinstinctsdoula.net/uploads/1/3/0/7/130739971/kowiwe-tuwutaniwu-buxiledaxup-mijenevubuwiv.pdf
    • http://kekug.alderbowman.com/uploads/1/3/1/4/131454106/lafozu_batexagutew_rimekik_zulopim.pdf
    • http://files.seenbyc.com/uploads/1/3/0/7/130775520/8c711.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/venaxuremiwijubut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/52556651712.pdf
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/9589215166.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/lugibe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/banuwaveru.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/tikosoziguta.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/10425416259.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/49169230446.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/womazerozolevovisomopofev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/bubudanajupuzezosub.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/18910634634.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/61174507220.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_off00007362.bin
cd48ef758648442e72f7a7780575c72eab1bb37b61c6cfd8fac0fcb4f031c758
pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 5284 bytes
font_01_sfnt_off00008568.bin
d8d1d0b6614442eb380c9993287a55533e683308dc1b04338abf8df0f68eaffc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8568 9844 bytes