Malicious PDF — malware analysis report

Static analysis result for SHA-256 3265e1bc912f7fc1…

MALICIOUS

PDF

39.8 KB Created: 2020-10-27 13:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be0b2aa302c835ebd300c74e6fbeffad SHA-1: 13eee8254562a193c2323d2267daf9f0f8d49aeb SHA-256: 3265e1bc912f7fc18520884d3d8ea988a30541cce1452bad5cbff34595c9c90e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to drive traffic to potentially malicious or spam-related content, possibly for SEO manipulation or phishing.

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://gettraff.ru/strik?keyword=acceleration+and+circular+motion+worksheet+answers
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/e2fdfabb.pdf
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/e850990e.pdf
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/nudedolabowivam_natijovewujidos_fogekajubu_xibukumaf.pdf
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/gamin.pdf
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f905a6a6ccb5.pdf
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5f9419362324d.pdf
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f968f4c8bd07.pdf
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f8db6407a56d.pdf
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f913b27c4fc1.pdf
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f8fa25351b2d.pdf
    • https://cdn-cms.f-static.net/uploads/4410214/normal_5f92d050a5ffa.pdf
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f883263a1bac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0496/1812/4963/files/telecom_industry_trends.pdf
    • https://cdn.shopify.com/s/files/1/0483/6153/7689/files/cenarius_ruf_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/coc_hack_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0497/7813/1095/files/zejakatufajunonazovoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/6501/6471/files/58358649834.pdf
    • https://s3.amazonaws.com/wiwuxot/curtain_wall_installation_method.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/lines_composed_above_tintern_abbey.pdf
    • https://s3.amazonaws.com/jolituzoji/cnet_downloads_editor_free.pdf
    • https://s3.amazonaws.com/zeworibuzoza/solid_converter_to_word_online.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_off00005d8e.bin
6cb8a03f6b734cf411120be5dc8b986b48b57cc2120c4d8e56df54d31b754e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8E 5324 bytes
font_01_sfnt_off00006f7c.bin
0686f1123ded7e253a91ba9877359e8c949a396b00be4c3279bf3a2f26bf34fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 9872 bytes

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