Malicious PDF — malware analysis report

Static analysis result for SHA-256 9215efe5a6876a23…

MALICIOUS

PDF

49.6 KB Created: 2020-08-10 19:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27cf9cab8115598e347bdb16d7297438 SHA-1: 52b6c271aa5b274fa72608646533cd4aa1957f14 SHA-256: 9215efe5a6876a234d1ba945c8726912c7ba1ea1ec000825d18495fb7255f6a0
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms a likely attempt to lead the user to harmful content. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=stroke+in+sickle+cell+disease+pdf
    • http://files.marisamdesign.com/uploads/1/3/1/1/131163613/bigimupisoxawiv_lozizabak_balokim.pdf
    • http://tonisog.annebeancreative.com/uploads/1/3/1/4/131407089/zezepobak.pdf
    • http://files.oddlyunjust.com/uploads/1/3/1/3/131380063/vegakegesure.pdf
    • http://files.lion-chemical-stores.co.uk/uploads/1/3/0/8/130814232/8001bb1.pdf
    • http://zuzesuda.emmettgallagher.com/uploads/1/3/1/6/131606094/8341087.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/45047748536.pdf
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/42758244643.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/kupox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/93332365713.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/56257551170.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/sisolewejupusov.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/4274587103.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/12234292801.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/act_no_network_data_received.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/asma_diagnostico_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/92136298639.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/zexasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/26460719421.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/building_construction_drawing_book.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_off0000781d.bin
075397353f217704c55a54f442f53993018e305fa65c847dfe517098ab86da43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 5316 bytes
font_01_sfnt_off00008a3b.bin
3bb34b1db8225df3a494acaed3a7b61e9a77bde47c2b3a9176900ad9209265e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3B 14984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.