Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fdebf28d3e21ab…

MALICIOUS

PDF

50.4 KB Created: 2020-10-18 09:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf42d5fca61e68a87e439dd505a5ec9 SHA-1: 995639717d84607b407f6e6074d577ffeae4d2b6 SHA-256: e0fdebf28d3e21ab236f374eee7a44b1a19cb50f8e0d2c1db0fd26c3450fcfff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on various platforms. One of these links, https://ggtraff.ru/123?keyword=pause+countdown+timer+android, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attempt.

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=pause+countdown+timer+android
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ralas-tapupav.pdf
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/bfd2c0.pdf
    • http://schemas.android.co
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0483/0520/9499/files/weight_and_balance_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/lego_harry_potter_collection_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/fable_3_demon_doors_aurora.pdf
    • https://cdn.shopify.com/s/files/1/0498/6273/8075/files/mubagelatubada.pdf
    • https://uploads.strikinglycdn.com/files/93fb55cf-e93f-4847-843b-b5026aac921d/adobe_premiere_pro_shortcuts.pdf
    • https://uploads.strikinglycdn.com/files/c9adc1c0-4315-4735-ae21-53511e574295/42011573007.pdf
    • https://uploads.strikinglycdn.com/files/ea14b30c-5a9c-4e5d-9188-a1fda819a7eb/seregadesatewi.pdf
    • https://uploads.strikinglycdn.com/files/05b09724-2005-456c-bf20-9e8684f4b6fd/50331600024.pdf
    • https://uploads.strikinglycdn.com/files/aeb0ec50-16f2-4600-84bb-c6619b46278e/tagisuwenoni.pdf
    • https://cdn.shopify.com/s/files/1/0493/7537/9622/files/89582694995.pdf
    • https://cdn.shopify.com/s/files/1/0483/5901/4551/files/dairy_queen_ice_cream_cake_directions.pdf
    • https://cdn.shopify.com/s/files/1/0483/4902/0311/files/cladogram_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0476/4116/5990/files/45452391946.pdf
    • https://uploads.strikinglycdn.com/files/2996857f-a542-4076-ae71-e2c8375e685d/bibobozivikavupuvukijam.pdf
    • https://uploads.strikinglycdn.com/files/45b15257-3c24-4728-9df7-4bb609deb044/42386552219.pdf
    • https://uploads.strikinglycdn.com/files/afdd0c5c-5d4d-4da5-adce-3fae18f599d0/81914802443.pdf
    • https://uploads.strikinglycdn.com/files/c1c131e9-0c60-458b-9395-1273d3153f40/mofatovunelonepobim.pdf
    • https://uploads.strikinglycdn.com/files/47dd2435-6a1c-4b73-bc40-0ef91cf9f879/17044602592.pdf
    • https://uploads.strikinglycdn.com/files/e6b0ceb3-e6b1-4f71-bca3-0f2d08a2b34e/79069992101.pdf
    • https://uploads.strikinglycdn.com/files/d058f419-cc82-473f-8406-339b25ef8e79/wimebigog.pdf
    • https://uploads.strikinglycdn.com/files/3a7693f6-0df3-4278-a77f-387ddcf7eb0f/kefatukasemetobepupilog.pdf
    • https://uploads.strikinglycdn.com/files/8572374d-7a53-46ff-9358-0d76e7634893/46689249060.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_off000060b9.bin
bed6082c79590afff9ee4b4dc8f9df15569b2704f8f551f141cf40ecceedfa03
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 5144 bytes
font_01_sfnt_off0000721d.bin
4467a0ec965c4f551b2ddc5054869311e3cf967e8464c258467a46c33eb819f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 9180 bytes
font_02_sfnt_off00008be9.bin
fe4c9c5d519f6308c99a56a39b94a76dc4abd1ee5b9a6f2bad3d06fc7f068ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 14540 bytes