Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e368589c8de955…

MALICIOUS

PDF

46.2 KB Created: 2020-10-05 04:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73c2c7adbc4a7d3f6c8059772ed46ba0 SHA-1: 132694a352953c0140fbd37809cc14fdb82fd40c SHA-256: 16e368589c8de955d73ae32c427530c878cbbddec539b61ded302f5f6988a60a
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dka pediatric guidelines' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many PDF links indicates a link farm used for SEO poisoning or traffic redirection.

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://ggtraff.ru/strik?keyword=dka+pediatric+guidelines+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
    • http://zevog.elizabethjohnsonphillips.com/uploads/1/3/1/0/131070705/fopomixa.pdf
    • http://files.cjsclimbandplay.com/uploads/1/3/0/9/130969855/gipona-tovipumugaporaw-koponuwipa.pdf
    • http://files.ngmfpn.com/uploads/1/3/0/9/130969686/5578466.pdf
    • http://files.judobooster.com/uploads/1/3/0/7/130775063/afc6dcb1d74a0c.pdf
    • http://files.mercedesvianochauffeurlondon.com/uploads/1/3/0/8/130813055/lizojigesuze.pdf
    • http://pawoj.castpartynyc.com/uploads/1/3/1/4/131407668/3876887.pdf
    • http://files.herdiselmend.com/uploads/1/3/1/4/131455543/8393200.pdf
    • http://files.sandiegocsi.org/uploads/1/3/1/4/131482887/7261040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://uploads.strikinglycdn.com/files/4e5acaf0-ebe3-4cff-a242-e737a9a2bd9f/75326534943.pdf
    • https://uploads.strikinglycdn.com/files/51dca90a-718e-4384-aa07-bee12492d309/57317807824.pdf
    • https://uploads.strikinglycdn.com/files/d6831286-8d02-41f1-a441-f597f24be4a1/lokokiwimivebulewisatuso.pdf
    • https://uploads.strikinglycdn.com/files/02e15d1a-a2e9-4ae6-8054-6148ce5218b0/jumijexifisabefowar.pdf
    • https://cdn.shopify.com/s/files/1/0477/2757/5196/files/ralph_waldo_emerson_essays_first_series.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/mary_e._volz_elementary_school.pdf
    • https://cdn.shopify.com/s/files/1/0486/1984/7845/files/annunciation_triptych_ap_art_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1130/files/my_hero_academia_ep_51.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1776/files/is_lithium_more_reactive_than_potassium.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbb.bin
6beed63a22ec66a167de56d671cc8683cafddeb55b3be64fea15b88daab58d3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 5304 bytes
font_01_sfnt_off000071d9.bin
2691076151163fbd5524cf562f6cdbb0bb61a4ed23ca7a479a8f2f50593c068f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 6228 bytes
font_02_sfnt_off0000820a.bin
1e6644df3a7498a11a9302112c8494a2f1cfdff5d5fdb67f354d9beeb31c7a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 12468 bytes

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