Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d3857d658f88f5…

MALICIOUS

PDF

46.0 KB Created: 2020-10-18 01:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c1edce38e0fdef02935ead087b195fef SHA-1: 32bc7d3442d70c0b07107e7bcd1a0b6fba31ec28 SHA-256: 44d3857d658f88f5e5544bf17acdf64cdc9ee3a2856f299aed536463d24c36ba
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, likely for SEO manipulation, with numerous embedded URLs. The ML classifier also strongly indicated maliciousness. The embedded URL is likely intended to redirect the user to a malicious site, potentially for phishing or malware distribution.

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/123?keyword=paper+napkin+machine+manufacturers+in+china In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8b5d07dbf7e.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/af91eb0cac.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/mororuw.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/1238713.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/14f0805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6190/3005/files/xeperorapasulorizob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/endoscope_for_android_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/lekefuxetupedin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6039/5673/files/pobejinaduridozatilerigod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedecaef-610d-4002-a2fc-6021c1bfd357/18469254710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcf1109-d947-4d24-8dd7-64c1b3557608/86940950434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e661c26-5e21-4ac7-af60-b31d5359aa47/56953882797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e4b0df-fb0a-4485-98ff-db0499f39e2d/gitororilaretinetageles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b52b3c-0da4-40f9-af76-c057b2c55148/rikiwopakitofefavuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1956/6743/files/pokemon_go_latest_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/ririk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/cancer_de_tiroides_anaplasico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/tazazekelitogurilure.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 5288 bytes
SHA-256: 12e17fe9e49c3270d44526ee0524478c0a64c46a6cd02b3f8c611b7719fbdd64
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 10272 bytes
SHA-256: 18ef5f6f29c4b73b8e08ef58440060712e2a299d6c045d42cbe1e1b553340c99

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