Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1978b943990bac…

MALICIOUS

PDF

47.8 KB Created: 2020-08-02 11:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce00173f93f1c186674a042efed7c61 SHA-1: 8c0f0aff101f17fb3b0aecba39d957d145d68152 SHA-256: 6f1978b943990baca28f38b59719d13e6556c1e86e9e444b09385f8c53a6f113
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click on these links, which likely leads to further malicious activity such as phishing or malware downloads.

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.com/pify?keyword=1985+nba+finals
    • http://files.my-lhd.com/uploads/1/3/1/6/131606291/berapem-benuxar-kexakipud.pdf
    • http://files.novaqueue.com/uploads/1/3/2/6/132696280/xadowozaludujamozi.pdf
    • http://files.lyndhurstarttrail.com/uploads/1/3/1/3/131384127/boposuwebu-molebawadu.pdf
    • http://files.beautydestinationbykay.com/uploads/1/3/1/6/131606069/2641313.pdf
    • http://files.heavenstinyangels.com/uploads/1/3/0/7/130775373/winesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/fumble_table_5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/xepuvexiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/90034583905.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/prentice_hall_biology.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/bumodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/pisuduro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8878/1219/files/75523840935.pdf
    • https://cdn.shopify.com/s/files/1/0435/6754/6527/files/dekoximobobipakegunu.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/3208_cat_engine_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/44366651829.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/rakufozir.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_off00007ea6.bin
6db179e4b3500e0386ade9b0278d4836c71ee010474c1b5bb885c66aedeebc3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA6 5236 bytes
font_01_sfnt_off00009092.bin
5e629c6a28a6229010946c99ad0307dd2358bf1dbfc2ebfabb71b4a28c4d2813
pdf-font-stream PDF embedded font (sfnt) at offset 0x9092 9852 bytes