Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3864c89000953a…

MALICIOUS

PDF

42.9 KB Created: 2020-09-16 19:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e313c7cb34bb74db276a2c5a34ec8c SHA-1: d7dbc08e6064470de019bb57167461998fb43b84 SHA-256: 7c3864c89000953a034cbff736e65a91b6a477d1ef7b963bf111fb7d70e06a85
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of numerous links suggests a link farm or redirection strategy to obscure the ultimate malicious payload or phishing destination. No scripts were extracted, and the document body was heavily obfuscated.

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.club/wix?keyword=simply+filling+ww
    • http://domilidil.rooted-organics.com/uploads/1/3/1/4/131438583/gotofamo.pdf
    • http://files.lamodastylist.com/uploads/1/3/0/9/130969408/rimofewukuzuba_nurapap_tizavedad_zawuzidixav.pdf
    • http://files.harveyaraton.com/uploads/1/3/1/3/131380756/xapoxemi.pdf
    • http://files.ddsp.ca/uploads/1/3/1/4/131483361/bogujo.pdf
    • http://files.thecelticoracle.com/uploads/1/3/1/4/131452944/purifi_ginefiri_xuduto_fafoka.pdf
    • https://db7b97ba-2309-4daa-941b-7c7363180c8b.filesusr.com/ugd/e643da_8e27b0bee3364dc58b7721229f8689f3.pdf?index=true
    • https://eec1d889-bf61-4be7-856c-d2a9fc091142.filesusr.com/ugd/f95141_e17e20c50b7d4025b5894e5ef722c2ed.pdf?index=true
    • https://42c96d3b-411e-4100-a0cc-3e42c25e3a09.filesusr.com/ugd/154db6_20c8913494244b0d9413fc98e1a82726.pdf?index=true
    • https://0fffb673-8a32-4f47-96ad-9225d8414b7d.filesusr.com/ugd/44b221_6bc09035863f45bbb63047058fad88f6.pdf?index=true
    • https://4d712247-bd6a-489f-9c58-b1cfb92fc18a.filesusr.com/ugd/77941b_7d316f387e6345f697b5f487b76d8379.pdf?index=true
    • https://f3f86be2-2a53-4341-964e-ae61dd4f101b.filesusr.com/ugd/f459ea_ff08e789f8474950a6226a05b1862554.pdf?index=true
    • https://07083912-2c27-4c12-af74-68758890d8a0.filesusr.com/ugd/60ffa2_fddb0b089cc943bba0dc28bb5f5b72f9.pdf?index=true
    • https://5e1245fc-8ab0-4dc5-b493-b53b59c79c35.filesusr.com/ugd/a8ca0f_76513369ef884510986fc9d388f63dc8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/66960143861.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/runescape_dungeoneering_sagas_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/la_fitness_membership_cancellation_form.pdf
    • https://cdn.shopify.com/s/files/1/0454/3460/1640/files/waterfall_model_advantages.pdf
    • https://cdn.shopify.com/s/files/1/0486/2630/3134/files/college_algebra_clep_study_guide.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_off00006a47.bin
af7ba9052398b8a2e6ab67dbb6adc73e76fc64217886cf7daf378e76f983e8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 5032 bytes
font_01_sfnt_off00007b7c.bin
f7751d808101af13f6ee762569d663945b9a13bfc23d5c12f4f3b2aea7f7a28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 10336 bytes

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