Malicious PDF — malware analysis report

Static analysis result for SHA-256 618cbde959519694…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 14:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e4514f46280a00e7be3dcd8697c79a SHA-1: 8b5d1e9d12a407f12ffc9ea9026ce923878a33a8 SHA-256: 618cbde959519694d411a7193a6cb1f0faf20e869c370be67d4efee3a9415ea3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple embedded links, including one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.cc/pify?keyword=sambalpuri+bhajan+video++2018' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a link farm, likely intended to drive traffic to various sites, one of which is malicious. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sambalpuri+bhajan+video++2018
    • http://dekuxez.countrywalkvet.com/uploads/1/3/1/3/131383478/4701410.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/8548/3422/files/80134949659.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/funny_tts_lines.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/didederuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/51572634260.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/rezudiruzozotibur.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/37551756196.pdf
    • https://cdn.shopify.com/s/files/1/0452/9104/5026/files/netnography_doing_ethnographic_research_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e4b.bin
d3e20674a3f2bfda50a633d3b62d2c22e9228980319ff0305ff969820b58b282
pdf-font-stream PDF embedded font (sfnt) at offset 0x3E4B 5724 bytes
font_01_sfnt_off0000518c.bin
8ca6c455d14ec64c6a7999e3430324bde1b3e57ef249872ec2cf9271061f4bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x518C 9548 bytes
font_02_sfnt_off00007244.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 4324 bytes