Malicious PDF — malware analysis report

Static analysis result for SHA-256 2712624e10cdc2bb…

MALICIOUS

PDF

40.2 KB Created: 2020-09-03 15:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcacd47e4da4798d46a21534e771f398 SHA-1: 1ab1827206a422aa5a1fbdefad154de97a7a2567 SHA-256: 2712624e10cdc2bb20e941438aad399f772f96d2ef106bc333e14dfc95732f8c
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to a redirector service, indicating a link farm or phishing lure. The primary heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' directly flags a URL that leads to malicious infrastructure. The document body contains the same keyword as the initial redirector URL, suggesting a coordinated lure. No scripts were extracted from this sample.

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.me/wix?keyword=formation+brancardier+lyon+gratuite
    • https://static.usrfiles.com/ugd/9ea9b6_8c23fae2532c41ac910de959355356f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d359321b5fff4683a280c6921c7f4365.pdf
    • https://static.usrfiles.com/ugd/b8c837_00599d8ac6fc4720becba405955ae7e7.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/excel_consolidate_text_data_from_multiple_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/loss_of_the_assumptive_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/25497240786.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/paint_shop_pro_6._0_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/mrs._creampie_mia_malkova_heavy_cream_delivery.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/mathematical_methods_for_economic_theory_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/bridgman_drapery.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/bhagavad_gita_full_text_english.pdf
    • https://static.usrfiles.com/ugd/111c46_ac3563127d17468e8dc82572e8bb3e97.pdf
    • https://static.usrfiles.com/ugd/93971e_a4bfbe90b26b440abd475bf5c4244960.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_off00005b37.bin
035a793b9c18711ab925002aa1dec2385549544e4e5113d01754f2f2f2d44c45
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 5276 bytes
font_01_sfnt_off00006d15.bin
baaa92f5ba48eea3915044eb1c1422690c02e28c62ef734314672dcf0447de07
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 11876 bytes