Malicious PDF — malware analysis report

Static analysis result for SHA-256 16df7f7826114a24…

MALICIOUS

PDF

47.8 KB Created: 2020-08-10 00:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f503c7e619d7221244f0a0e6ccaab06 SHA-1: 7a5c6de7940d5841c8229a2bcee0e31626809380 SHA-256: 16df7f7826114a2449e9bde906f61a9412088fb785a935a3e5a1feb57a4c4161
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=ascendance+trilogy+book+1+pdf', is designed to trick users into downloading content, likely leading to further malicious activity. The ML classifier strongly indicates malicious intent.

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/pify?keyword=ascendance+trilogy+book+1+pdf
    • http://zofip.nomoreryans.com/uploads/1/3/1/4/131438453/kekixujujuse-barusuxafalofip-rojurop.pdf
    • http://files.wviolin.com/uploads/1/3/1/6/131607229/1972041.pdf
    • http://files.eurekamakingadifference.com/uploads/1/3/1/0/131070625/5528038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3313/2193/files/zekisazuduzaxafetizuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/memento_mori_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevesuladufutaniwor.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/msxml_4._0_sp2.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/cloud_architecture_patterns_o_reilly.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/dezexomirubibisut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/38313191611.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/behavioral_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/82229035712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/mikadatunowegedasotevexam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/71523537942.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/nusevanive.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_off00007d20.bin
c04a35b6e2d0072a68af730c791975984958a64a5d0b7ec6548c68605dd59bd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 5668 bytes
font_01_sfnt_off00009085.bin
6cabb53fcac30e64d0b99005597c5438d1e73c3cec7714ac4f7c693c21809018
pdf-font-stream PDF embedded font (sfnt) at offset 0x9085 9964 bytes