Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a519f090e48f805…

MALICIOUS

PDF

52.0 KB Created: 2020-08-24 06:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a382dcdb9a793c24cb4136e2f6dd7f37 SHA-1: ccee523f4a9ae29f03b3ceabf529adec6b915f58 SHA-256: 6a519f090e48f805a20ffec42ce1a9ddd5c4adf73c577eba4adc4eba115c7bd1
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a medication guide, aiming to trick users into visiting a harmful site. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm for SEO manipulation or traffic redirection. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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=glatiramer+medication+guide
    • http://files.parcelstoplaces.com/uploads/1/3/0/8/130814124/tepamarukotovororu.pdf
    • http://files.annaprigl.com/uploads/1/3/1/6/131637701/474e9cafdf1c.pdf
    • http://files.masterthompson.us/uploads/1/3/1/8/131857758/d0175694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/2759770900.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/44943919083.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9733/files/kupawiga.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/speak_up_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/kubunip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/building_other_construction_workers_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/gumojukotimuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/nixoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/70098119130.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/common-_size_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0445/8813/8660/files/functions_of_morphology_in_linguistics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/bhakti_bhakti_gana.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/denotixabetirebanota.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/tapased.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/depoxokenumedoragoxinixu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000760f.bin
6e03c2b94003e059f951210e64984f1f4362bc55e80b571a8123c1df3e22a711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 4996 bytes
font_01_sfnt_off000086ef.bin
687836202c13118281100a3360c2af765a4f5bcdec53c8551a2d5c9c3b750951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 14716 bytes
font_02_sfnt_off0000b443.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB443 4324 bytes

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