Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e1affbc2fa63d0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-25 11:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2bf11763eed68498f6180da8458fef SHA-1: 4879db3040386a2b649cf39bf21ee5a493c1ed92 SHA-256: 72e1affbc2fa63d08e9817d8bb5410cc8a056eddff6bd929b451cd209f5dee1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

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.ru/pify?keyword=basco+lighthouse+information
    • http://files.simplyyoucoaching.com/uploads/1/3/0/8/130814133/3005039.pdf
    • http://bobeguk.thewifebehindthefarmer.com/uploads/1/3/1/4/131408970/721873.pdf
    • http://files.todayssmoothie.com/uploads/1/3/0/7/130739022/jewelosaguvu.pdf
    • http://files.tpinw.com/uploads/1/3/2/6/132683328/pibij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1750/0834/files/video_avenged_sevenfold_dear_god_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/crossword_answer_for_short_high_pitched_sound.pdf
    • https://cdn.shopify.com/s/files/1/0435/8347/1771/files/dinokisugaboraze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/milaxutipuzudezodutemob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1774/files/44823343678.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/jekifademom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/cancionero_latinoamericano_letras_y_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/greenhouse_gases_and_global_warming.pdf
    • https://cdn.shopify.com/s/files/1/0459/9110/0583/files/full_form_am_pm_time_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/advanced_financial_accounting_11th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/cerebral_vasculitis_treatment_guidelines.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_off00006611.bin
d100552ed6a0869b95818a73b636a224f9cedbc377cdebf7aaaedb7839d2cd4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5344 bytes
font_01_sfnt_off00007808.bin
130128ab4cf47777a1257de2929a52c159ec3c563a304ba266424e5514851298
pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 9956 bytes