Malicious PDF — malware analysis report

Static analysis result for SHA-256 d418d0f44e67ca39…

MALICIOUS

PDF

37.0 KB Created: 2020-08-31 04:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12092116bb5a425a2d45f0c134ab78b2 SHA-1: bf6b1e6dc6378e672dac911b68e62d6b8944c1e9 SHA-256: d418d0f44e67ca3912f62486e222461e5ee31c8aa8576d51671b72526e543fda
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=download+revival+selena+gomez+album', is designed to redirect users to potentially harmful content. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract traffic. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=download+revival+selena+gomez+album
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/36315021351.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/xtools_pro_arcgis_10._1_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/baresapolumulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/naar_new_song_babbu_maan.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/cancer_de_mama_minsa_peru.pdf
    • https://cdn.shopify.com/s/files/1/0466/7411/6773/files/66654618979.pdf
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/wamugilipubavijime.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/tamil_guide_10th.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/38828375900.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/84370414366.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/17706476951.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/bioshock_infinite_strategy_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/grid_template_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/66299808105.pdf
    • https://cdn.shopify.com/s/files/1/0435/1062/8511/files/daxusekuxetamiboga.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051dd.bin
ff113d149f6703f76e44078718c09424b23e5c83f87da639cce65f7b2b62ad15
pdf-font-stream PDF embedded font (sfnt) at offset 0x51DD 5484 bytes
font_01_sfnt_off00006494.bin
3942dcf6bfa186dcdc4de08ef0875c6cf30a0ba7b5af8d94ba4a44db2c2e37f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 10148 bytes