Malicious PDF — malware analysis report

Static analysis result for SHA-256 118d9631be8e8213…

MALICIOUS

PDF

65.0 KB Created: 2020-08-08 05:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c571dc3efd5afc7481afa7ca32ef75 SHA-1: 0ea1d6fe1099e30939fc47482c87da8fa2d47dcc SHA-256: 118d9631be8e821384d5083088f32a8f6a147edc3b160bfce40035f35fb1d9dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a link farm designed to redirect users, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=artaud+anthology+pdf
    • http://files.osatelegraph.org/uploads/1/3/1/3/131398452/xixumuz-lujoxofu-vupawipuzino.pdf
    • http://files.modelrailways.tv/uploads/1/3/2/6/132682862/9667580.pdf
    • http://files.anxietytreatmentqueens.com/uploads/1/3/1/8/131856005/996602ed0d39a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/damixawilikujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0484/6503/files/50944122563.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/56211403856.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/lamuvajerominij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/expos_sur_l_amenagement_du_territoire_ivoirien.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/28020561807.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/iteration_of_rational_functions.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/gukidimimasoreluwavusuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/7473469744.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/sims_3_hairstyles.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_off0000c1be.bin
3380edff2261162c4d036c6a5da7f2db69bb378020167f8ea961ce55afc901ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BE 5216 bytes
font_01_sfnt_off0000d385.bin
454764024504e7f863c4297aa8da897416e131adcfd866c00376a1245e77aa92
pdf-font-stream PDF embedded font (sfnt) at offset 0xD385 10596 bytes